Clean Eatz Dinners

Montana Athletic Club in Bigfork stocks chef-prepared, macro-friendly Clean Eatz meals right at the club so you can grab a balanced dinner on your way out the door. No planning, no prep, no cleanup — just a healthy, ready-to-enjoy meal that fits your training instead of fighting it. Balanced macros are dialed in for you, making Clean Eatz the easiest way to keep your nutrition on track after a hard workout. Available at the club at 850 Holt Drive, Bigfork, MT 59911. Stop by after your next session and see what’s stocked today. Call (406) 837-2582 for more information.

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406·837·2582 Join Now →
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Bigfork, Montana · Since 1991

You Belong Here.

Step into more than a gym. This is where your goals matter, your effort counts, and your journey is celebrated. Find your strength, your community, and your confidence — all in one place built for you.

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— About The MAC

Forge your fitness.
Built for
community.

The Montana Athletic Club was built as a partnership between Doug Mahlum and Jack Tawney in 1991 at 17,000 SF with 600 members. Today the MAC is a 32,000 SF, full-service facility serving 3,000 members with world-class trainers and instructors.

We pride ourselves on exemplary service and strive to meet the needs of every member and guest. Come be part of our family and enjoy all we offer — what's keeping you from getting fit?

Contact Us →
Functional turf and squat racks at the Montana Athletic Club
34
Years strong
— Who we are

More than three decades in, this is who we are.

1
The Club

Thirty-two thousand square feet. One membership.

Two heated indoor pools — a lap pool for year-round swimming and a 92-degree therapy pool. Three group fitness studios plus a dedicated Pilates studio. Twenty-five hundred square feet of functional turf with power racks, a rig and suspension training. A three-quarter size gymnasium, four outdoor pickleball courts and family change rooms.

Weight and cardio floors feature Matrix, Precor and Octane premium equipment. Locker rooms with steam, sauna and hot tub. A recovery room, tanning, a full Pro Shop and a café corner with grab-and-go meals.

RiverBend Physical Therapy and the Elysian Institute are here too — same roof, same front door.

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Weight room with Life Fitness and Hammer Strength equipment at the Montana Athletic Club
2
Concierge desk at the Montana Athletic Club
The People

Three thousand members in a town of 5,500.

Doug and Nancy Mahlum have run the MAC as a family business for more than three decades — Doug on the floor and the build-outs, Nancy on the members and the programming. Their goal has always been providing the most up to date quality equipment, programs and experience possible to the community of Bigfork.

Christine Neu has led the Group Exercise Department for 34 years. Ashton Freeman leads an outstanding Personal Training Department, which has over 120 years of combined training experience. Cutting edge CNU Stretch Therapy is now available and quite popular. Private Pilates is led by Lesli Skidgell with Michelle Wiggins. Our Concierge Department staff, led by Sara Tanzi, are trained to find out what YOU actually want, then figure out a way to get you there at the best price possible. We care about your results - at the MAC you are more than just a number.

Almost everyone who works here knows the regulars by name — and most of them by their goals. Join the MAC Family today!

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3
The Difference

Not just a nameless keycard with a few machines and limited weight options.

Seventy-plus live classes a week taught by real instructors, including eight licensed Les Mills programs. A staffed front desk every hour we're open.

Testing that goes as deep as you want to take it — from InBody composition scans to PNOE metabolic analysis. Or don't take it at all, and just swim your laps.

Month-to-month membership, no long-term contract, and Scholarship Memberships for anyone who needs one. Your membership travels too: reciprocal access at partner clubs across Montana, Idaho and Washington. No one in Bigfork can offer you so much value for your dollar!

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Spin studio classes at the Montana Athletic Club

Come see it for yourself — a Concierge will walk you through the whole building.

Book a Visit → Become a Member →
Now inside the MAC

Elysian Institute — the most complete recovery & wellness business in the Pacific Northwest.

Cryotherapy, IV nutrient infusions, infrared sauna, red light, hyperbaric and more — advanced recovery and wellness, steps from the gym floor.

Explore Elysian →
Inside the club

Every amenity you need — all under one roof.

A heated indoor pool, sauna & steam, functional training, group classes, spin, recovery, tanning, InBody and more — world-class amenities, all included with your membership.

12+
Amenities
70+
Classes / wk
32k
Square feet
Explore Amenities →
— Our Services

Services & Programs

View all →
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— Member Moments

What our members say

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Discounted Guest Passes

Why wait at the front desk? Grab a discounted pass right now — special pricing for families & couples.

Get a Pass →

New Online Gift Cards

Give the gift of health! Buy gift cards for anyone on your list, delivered instantly.

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— About Us

A family, not a franchise.

Inside the Montana Athletic Club

From 600 members to 3,000 — and still growing.

Founded in 1991 as a partnership between Doug Mahlum and Jack Tawney, the MAC opened at 17,000 SF with 600 members. Today we span 32,000 SF and serve 3,000 members across Bigfork and the Flathead Valley.

We're a full-service facility with world-class trainers and instructors. We pride ourselves on exemplary service and treat every member and guest like family.

32k
Square feet
3,000
Members

Meet our team

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— Your club, in plain terms

What a full-service athletic club in Bigfork includes

Montana Athletic Club is a member-owned, full-service health club at 850 Holt Drive in Bigfork, Montana. Inside roughly 32,000 square feet you'll find weights and cardio floors, a heated indoor pool, three group fitness studios, outdoor pickleball courts, a recovery room, tanning, a complete Pro Shop featuring Oakley, Helly Hansen and other fitness brands and a café corner with grab-and-go meals — everything under one roof, included in one membership. The club has served the Flathead Valley since 1991, when it was founded by Doug Mahlum and Jack Tawney, and today counts about 3,000 members. In 2026, they added the most complete recovery and wellness business in the Pacific Northwest — the Elysian Institute.

That's the difference from a 24-hour access gym: A Montana friendly staffed front desk, 70+ live classes a week, actual pools, real courts, and people who know your name — not just a keycard and a room of machines.

Who is the club for if I live in Kalispell, Whitefish or Polson?

Members drive in from across the valley — Kalispell, Whitefish, Columbia Falls, Lakeside, Somers and Polson — because a single membership covers the pool, courts and every class. Bigfork sits on the northeast shore of Flathead Lake, about 20 minutes from Kalispell and 15 from Lakeside. And when you travel the other way, your membership travels too: MAC has reciprocal access at partner clubs across Montana, Idaho and Washington at no extra charge.

What is a first visit like?

Walk in, say Howdy! at the Front Desk, and a MAC Concierge will show you around — the pools, the training floors, the studios and the courts. Our Concierges are trained to find out what YOU want - and then figure out a way to meet those needs! You can go as deep as you want—sophisticated InBody testing, medically based PNOE Metabolic testing, blood draws, there is no limit. Perhaps you just want a place to swim a few laps or push around some weights - we can do that for you, too! Most people simply pick what they came for, whether that's a lap swim, a group class or open court time. If you want guidance, personal training starts with a conversation about your goals, and membership options are flexible month-to-month — no long-term contract required.

Where can I play pickleball in the Flathead Valley?

Right here. About 20 minutes from Kalispell, Montana Athletic Club offers pickleball at 850 Holt Drive — four outdoor pickleball courts, plus indoor play in the club's three-quarter-size gymnasium, so play continues year-round through Montana winters. All levels are welcome, and the Front Desk can point you to current court schedules and open-play times.

An indoor pool in Bigfork?

Montana Athletic Club in Bigfork has a heated indoor pool — for lap swimming, aquatic group classes and swim lessons — all included with membership. That makes it one of the few places in the Flathead Valley where you can swim year-round regardless of the weather, whether you're driving in from Kalispell, Lakeside, Somers or Polson.

Can my kids learn to swim here?

Yes — group and private swim lessons run in our heated indoor pool for every age and ability, from water-safety basics for little ones to stroke refinement for adults. Questions? Contact the club or call (406) 837‑2582.

— Answers to the most

Frequently asked questions

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— Membership

Pick your plan

No long-term contracts. Flexible month-to-month memberships. Why pay more elsewhere and get less? Every MAC Membership includes the gymnasium, three weight rooms, three Studios, two pools, sauna, steam and hot tubs and over 70 Group Exercise classes a week. But the best part? The friendly, welcoming smile you receive every time you come in - after all, you are part of the MAC Family now!

Scholarship Memberships

Available for those who qualify — please don't hesitate to ask. Your health is too important to be governed by your financial situation.

Corporate Rates

For businesses and large organizations — like school districts. Ask the front desk about group pricing for your team.

Student & Senior Rates

High school and college memberships are available, as are senior rates.

Short-Term Memberships

In Bigfork for a few days or weeks? There's a membership solution for that, too.

— Membership Rates

A membership for every season of life.

Membership rates vary based on the type of membership you need. Our ultimate goal is essentially the same as yours — to get you into the club so we can help you optimize your health and wellness.

MAC rates run anywhere from $48 to $65 per month for year-round memberships, with slightly higher rates for short-term options.

The MAC Concierge will help you find the best possible solution for your health and wellness needs.

Year-round memberships run $48–$65/mo (a little more for short-term). Scholarship Memberships are available for those who need them — just ask. Confirm current rates with the front desk at 406·837·2582.

— Amenities & Programs

Everything
under one roof.

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Learn More →
— Group Exercise

Class schedule

Our live schedule is powered by SmartHealthClubs — the same system behind the MAC app. Click below to open the current schedule in a new tab.

— The MAC Blog

Read up.

— Get in touch

Come say hi.

Visit
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Hours
Mon–Fri  5 AM – 9 PM
Sat–Sun  8 AM – 6 PM
Call
406·837·2582
Email
info@montanaathleticclub.com
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— Reciprocal Membership

Train anywhere.

Your MAC membership travels with you. Through our reciprocating network, members in good standing can work out at partner clubs across the region while on the road — same great access, no extra fee.

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Reciprocal clubs

Show your MAC membership in good standing at any of these partner clubs.

Planning a trip? Confirm access & hours before you go.

Reciprocal partners change seasonally — call ahead and we'll confirm current access at your destination.

406·837·2582
— Health Technology

Know your numbers.

The most sophisticated health baseline available in Montana.

Most gyms hand you a keycard and leave the rest to guesswork. The Montana Athletic Club gives you actual physiological data — your metabolism, your blood, your body composition — then builds your training around those real numbers. Members from across the Flathead Valley, from Kalispell and Whitefish to Polson and Columbia Falls, drive to the MAC specifically for access to this level of analysis.

3
core analysis tools
Medical-grade
breath & lab analysis
Flathead Valley
exclusive access in Bigfork
1 membership
full access included
— Pillar 1

PNOE Metabolic Testing

Medical-grade breath analysis that measures how your body actually produces and burns energy — the most precise metabolic picture available in Montana.

What is PNOE metabolic testing?

PNOE (pronounced "P-no-ee") is a medical-grade metabolic analyzer that measures how your body produces and burns energy at rest and during exercise. By analyzing the gases you exhale — oxygen consumed and carbon dioxide produced — it maps your complete metabolic profile: resting metabolic rate, fat-vs-carbohydrate burn ratios, cardiorespiratory fitness level and metabolic age.

The result is not an estimate based on height and weight. It is a direct measurement of your individual physiology — the kind of data previously available only in clinical or research settings.

Where can I get metabolic testing in the Flathead Valley?

Montana Athletic Club in Bigfork offers PNOE metabolic testing through the on-site Elysian Institute at 850 Holt Drive — the only location in the Flathead Valley offering this level of metabolic analysis. Members from Kalispell, Whitefish, Columbia Falls, Polson and across the valley make the trip specifically for this test.

Resting Metabolic Rate

How many calories your body burns at complete rest — the foundation of any accurate calorie target, not a formula estimate.

Fat vs. Carb Burn Ratio

The exact proportion of fat versus carbohydrate your body uses for fuel at each heart-rate zone — so training zones are personal, not generic.

VO2 Max & Metabolic Age

A direct measurement of cardiorespiratory fitness and how it compares to your biological age — a true benchmark for long-term health.

— Pillar 2

Certified Lab Blood Work

Full lab blood panels drawn on site through the Elysian Institute — so your program is built on your actual biomarkers, not guesswork.

Can I get blood work done at my gym?

At the MAC, yes. Through the Elysian Institute at 850 Holt Drive, certified phlebotomists draw full lab panels on site. Results give you a complete picture of your internal biomarkers — testosterone and hormone levels, thyroid function, inflammatory markers, lipid panel, metabolic panel, glucose and insulin response, iron, vitamin D and more.

Most gyms in the Flathead Valley — or anywhere in Montana — cannot offer this. The MAC can because the Elysian Institute is a full clinical-grade facility operating at the same campus at 850 Holt Drive, Bigfork.

How do I know if my training is working?

Feeling better is real feedback — but actual biomarkers do not lie. A baseline panel at the start of a new program and a repeat panel after 8–12 weeks shows exactly what changed: testosterone, inflammation levels, metabolic markers, all in numbers. Combined with InBody and PNOE, you have the most complete physiological picture available at any gym in Montana.

Drawn on site at the MAC

No separate lab trip. The Elysian Institute at 850 Holt Drive handles the draw and your results through a certified clinical team.

Full biomarker panels

Hormones, thyroid, inflammation, lipids, metabolic markers, glucose response, iron, vitamin D and more — a real clinical-grade panel, not a generic wellness screen.

Training built on real numbers

When your trainer can see your actual biomarkers, they stop guessing on intensity, recovery time and nutrition guidance. The plan becomes specific to your physiology.

— Pillar 3

InBody Composition Analysis

Precise body composition in under 45 seconds — muscle mass, body fat, visceral fat, hydration and more — the real baseline to measure progress against over time.

What does an InBody scan measure?

The InBody scan uses bioelectrical impedance analysis to measure your body's composition with clinical precision. In under a minute, it produces a full segmental breakdown: lean muscle mass in each limb, body fat percentage, visceral fat level, skeletal muscle mass, total body water and a basal metabolic rate estimate — everything a scale cannot tell you.

Unlike BMI calculations, the InBody shows exactly where your muscle is distributed and where your fat is stored. Re-test every 4–6 weeks and you can see whether your program is building muscle, reducing fat or doing both simultaneously — in numbers, not feelings.

45 seconds. A complete picture.

Step on the platform, grab the handles — 45 seconds later you have a precise segmental map of your body: muscle, fat, visceral fat and hydration in each region.

Beyond what the scale shows

Lose five pounds of muscle, gain five of fat — the scale calls it even while your health moves backward. The InBody splits the story into its actual parts.

Re-test to track real progress

Scan every 4–6 weeks under the same conditions. A good training block often shows the scale flat while muscle climbs and fat falls — the scan shows you both.

— Also Available at the MAC

Supporting technology

Beyond the three core analysis tools, MAC members have access to additional technology that informs training, movement and recovery.

Kinotek Movement Analysis

Video-based movement analysis that identifies imbalances and compensation patterns before they become injuries. Available through the Elysian Institute.

Learn more ↗
CNU Stretch Therapy

Certified assisted-stretching at the Elysian Stretch Center — targeted stretching to restore range of motion, reduce chronic tightness and accelerate recovery.

Learn more ↗
MyZone Effort Tracking

Real-time heart-rate zones during every workout. When your PNOE data defines your actual zones, MyZone tracks whether you are truly training there.

See group classes →
— Frequently Asked

Questions about health technology at the MAC

What is PNOE metabolic testing?

PNOE is a medical-grade metabolic analyzer that measures how your body produces and burns energy by analyzing your exhaled breath gases. It produces your resting metabolic rate, the ratio of fat versus carbohydrate your body burns, your cardiorespiratory fitness level and your metabolic age — precise data previously available only in clinical research settings. Available at Montana Athletic Club in Bigfork through the Elysian Institute.

Where can I get metabolic testing in the Flathead Valley?

Montana Athletic Club in Bigfork offers PNOE metabolic testing through the on-site Elysian Institute at 850 Holt Drive — the only location in the Flathead Valley offering this level of metabolic analysis. Members travel from Kalispell, Whitefish, Columbia Falls, Polson and across the valley for the test.

What does an InBody scan measure?

An InBody scan uses bioelectrical impedance to measure lean muscle mass in each body segment, total body fat percentage, visceral fat, skeletal muscle mass, body water balance and an estimated basal metabolic rate — all in under 45 seconds. Unlike a scale, it shows the composition of your body so you can distinguish fat loss from muscle gain.

Can I get blood work done at my gym?

At the Montana Athletic Club, yes. The Elysian Institute at 850 Holt Drive offers certified lab blood draws on site. Full biomarker panels cover hormones, thyroid function, inflammatory markers, lipid panel, metabolic panel, glucose and insulin response, iron, vitamin D and more. No separate lab trip required.

How do I know if my training is working?

The most reliable answer is a combination of re-testing at regular intervals: an InBody scan every 4–6 weeks to track changes in muscle and fat mass, a follow-up blood panel after 8–12 weeks to see how biomarkers have shifted, and periodic PNOE retests to check whether cardiorespiratory fitness and metabolic efficiency are improving. Together these three data points make progress — or its absence — impossible to miss.

— Get Started

Talk to a MAC Concierge

Not sure which testing is right for you? Stop by the front desk or give us a call — a MAC Concierge will walk you through the options and help you build the right baseline for your goals.

— InBody Body Composition

Find out what you’re actually made of.

A full body composition scan in under a minute. Included with your MAC membership.

InBody body composition scanner at Montana Athletic Club in Bigfork
⚠️
Safety Notice

The InBody test cannot be used by anyone with a pacemaker or other implanted electronic medical device.

— What It Measures

Six numbers the scale never gives you

Skeletal Muscle Mass

The trainable muscle separated from organs and body water. This is the number to protect when losing weight — if it falls alongside fat mass, the program needs adjustment. If it holds or rises while fat falls, the program is working.

Body Fat Mass & Percent Body Fat

Total fat in kilograms and as a percentage of body weight. The percentage provides context the raw number alone cannot — two people of identical weight but different composition face completely different training priorities.

Visceral Fat Area

Fat stored around the abdominal organs, reported in square centimeters — distinct from subcutaneous fat stored under the skin. The InBody estimates and tracks it over time using the same impedance measurement.

Segmental Lean Analysis

Lean mass measured across five compartments: both arms, both legs and trunk. Left-right imbalances and a weak trunk show up as numbers rather than guesses — useful for injury prevention, rehab tracking and strength programming.

Total Body Water

Split into intracellular (inside cells) and extracellular (outside cells). Roughly 60% of body weight in men and 55% in women is water, and fat-free tissue is about 73% water — which is why hydration moves your reading. Body water is best read as a consistency check on the test, not as a health metric.

Basal Metabolic Rate

An estimate of calories burned at complete rest, derived from lean mass rather than height and weight. Because muscle burns more at rest than fat does, two people of identical weight can have meaningfully different resting calorie requirements.

— The Test

What happens during the test

1
Remove shoes and socks, wipe hands and feet

Clean, dry contact points are essential for accurate impedance readings. The machine’s sensors need direct skin contact.

2
Step onto the platform and grip the hand electrodes

Both thumbs rest on the upper sensors and your fingers on the lower sensors. Keep your arms slightly away from your sides so they don’t touch your torso.

3
Stand still and breathe normally

Arms slightly away from your body, feet on the marked contact points. No talking, no shifting weight.

4
A low-level electrical signal passes through your body

The current is imperceptible. Lean tissue — which is roughly 73% water — conducts easily. Fat resists. The difference in resistance is what the device measures and translates into composition data.

5
The scan itself takes 15 to 60 seconds

Depending on the specific InBody model. You’ll hear a tone when it’s complete.

6
You receive a printed result sheet

A MAC team member walks you through your numbers so you leave with a clear picture of your current baseline and what to watch on your next scan.

— Before You Come In

How to prepare

Preparation genuinely changes result quality. The more consistently you follow these steps across sessions, the more meaningful your comparisons over time. Consistency matters more than perfection.

Stand upright 5–10 min first

Let your body fluids settle before testing. If you’ve been sitting in a car or at a desk, stand and move for a few minutes.

🍴
Wait 3 hours after eating

Food and drink in your system affects body water distribution, which directly moves the impedance reading.

💪
Test 1–3 days after hard exercise

Intense exercise causes temporary fluid shifts and muscle swelling. Test 1 to 3 days after a hard session, not the morning after.

🚷
Empty your bladder first

A full bladder adds water weight that will show up in your reading. Use the restroom immediately before the test.

🏊
Skip the sauna or long swim that day

Heat exposure and water immersion both shift body water temporarily. Avoid sauna, steam room and pool sessions before testing.

📅
Same conditions every retest

Test at the same time of day, in the same hydration state, after the same type of preparation. The consistency of your protocol is what makes the trend meaningful.

— Understanding Your Scan

How to read your results

One scan is a data point. Two scans are information. The most useful thing you can do with an InBody result is compare it to your previous one, taken under the same conditions, 8 to 12 weeks later.

The most important comparison is simple: did skeletal muscle hold or rise, and did fat mass fall? If both, the program is working regardless of what the scale says. The scale cannot distinguish between those two numbers — the InBody can.

Segmental analysis is most useful for spotting asymmetry. If your right arm is consistently stronger than your left, or if your trunk lean mass is low relative to your limbs, that shows up in the segmental table. A trainer can use that directly.

Body water is best read as a consistency check on the test itself rather than as a health metric. If total body water changes dramatically between sessions without a change in diet or training, it usually means preparation was different — not that your health changed.

— Who It Is For

Is this test for me?

An InBody scan is useful for anyone who wants to know what their body is actually made of. It is especially valuable for:

  • Anyone whose scale weight has stalled while their clothes fit differently — the scan will show whether composition is shifting.
  • Anyone in a calorie deficit wanting to confirm they are losing fat rather than muscle.
  • Anyone over 50 tracking skeletal muscle mass as part of healthy aging.
  • Anyone starting with a personal trainer who wants a real baseline before day one.
  • Anyone returning from injury checking whether strength and lean mass on the affected side has caught back up.
— Retesting

How often to retest

Every 4 to 12 weeks, depending on how actively your training or nutrition is changing.

More often than every 4 weeks and you are mostly measuring normal water fluctuations rather than genuine changes in muscle or fat tissue. Those take time to build or reduce in a way the scan can detect.

If you are working with a MAC personal trainer, they will typically schedule your retests at 6 to 8 week intervals to align with training blocks.

Manufacturer accuracy data: InBody publishes a 98% correlation with DEXA scanning and 99% reproducibility for its devices. Those are the manufacturer’s own published specifications, not claims made by the Montana Athletic Club.

— Frequently Asked

InBody questions answered

What does an InBody scan measure?

An InBody scan measures skeletal muscle mass, body fat mass and percentage, visceral fat area, segmental lean analysis across both arms, both legs and trunk, total body water split into intracellular and extracellular, and an estimated basal metabolic rate — all in under 60 seconds.

How long does an InBody test take?

Between 15 and 60 seconds depending on the device, plus a few minutes for setup and removing shoes and socks. A MAC team member walks you through your printed result sheet after the scan.

How should I prepare for an InBody scan?

Stand upright for 5 to 10 minutes before testing. Wait at least 3 hours after eating. Test 1 to 3 days after hard exercise rather than the morning after. Empty your bladder first. Avoid testing after sauna, steam or a long swim. Repeat under the same conditions every time — consistency matters more than perfection.

Is the InBody test included in my membership?

Yes. InBody scanning is included with your MAC membership. Stop by the front desk or ask a team member to get your first scan scheduled.

How often should I get tested?

Every 4 to 12 weeks. More often than 4 weeks and you are mostly measuring normal water fluctuations rather than genuine changes in muscle or fat.

Can anyone use the InBody?

The InBody test cannot be used by anyone with a pacemaker or other implanted electronic medical device. For all other members, there are no age or fitness-level restrictions.

— Related Services

Complete the picture

PNOE Metabolic Testing

Measure how your body produces and burns energy — resting metabolic rate, VO2 max and personalised training zones.

Full PNOE guide →
Certified Lab Blood Work

Drawn on site through the Elysian Institute. The internal picture to go with your composition data.

Blood work details →
Personal Training

Start with a real baseline. Pair your InBody results with a trainer who can build a program around your actual numbers.

Meet the trainers →
About InBody technology

InBody’s own overview of bioelectrical impedance analysis and what the numbers mean.

InBody website ↗

The Montana Athletic Club is a fitness and wellness facility, not a medical provider. Testing offered at the MAC is for fitness and wellness purposes and does not diagnose, treat, or rule out any medical condition. Please talk to your physician about any health concern, and before starting a new exercise program.

— PNOE Metabolic Testing

Stop guessing at your metabolism.

Breath analysis that measures how your body actually produces and burns energy.

Available at the MAC through the Elysian Institute at 850 Holt Drive, Bigfork.

— What It Measures

The only two things actually measured — and everything calculated from them

The PNOE analyzer directly measures oxygen consumed and carbon dioxide produced. Everything else on your report — every number, every zone, every ratio — is calculated from that pair. That honesty matters because it means the calculations are only as good as the raw measurements, which is why the device is calibrated before every test.

Oxygen Consumption & CO₂ Production

The only two values the device actually measures. Oxygen consumed in and carbon dioxide produced out. From these two numbers, every other output is derived. Knowing this helps you understand what the test can and cannot tell you.

Respiratory Exchange Ratio (RER)

The ratio of CO₂ produced to oxygen consumed. Around 0.7 indicates predominantly fat being burned. Around 1.0 indicates predominantly carbohydrate. Most people sit near 0.8 at rest. The ratio shifts with exercise intensity — tracking where it shifts is how the analyzer identifies your personal crossover point.

Fat vs. Carbohydrate Oxidation

The proportion of each fuel source your body uses at a given intensity, and the crossover point — the specific exercise intensity at which carbohydrate overtakes fat as the dominant fuel. This typically lands around 60 to 70% of maximum aerobic capacity, but is individual, which is the entire reason to measure rather than assume.

Resting Metabolic Rate (RMR)

The calories your body burns simply existing — accounting for roughly 60 to 75% of total daily energy expenditure. Online calculators estimating RMR from height, weight, age and sex can be off by 20% or more at the individual level. A direct measurement replaces the estimate with an actual number.

VO2 Max

The maximum rate at which your body can take up and use oxygen, expressed in millilitres per kilogram per minute. It is the single best established measure of cardiorespiratory fitness and responds directly to training.

Personalised Training Zones

Zones derived from your measured physiology rather than from an age-based heart-rate formula. Formula-based zones assume a population average. Measured zones reflect you — which is why people who have always trained “hard enough” by feel often discover they have been consistently in the wrong zone.

— Honest Limits

What metabolic testing cannot tell you

Breath analysis measures gas exchange. That is all it measures. It does not measure hormones and cannot assess thyroid function, cortisol levels or estrogen. Those require a blood panel.

PNOE is not a diagnostic test. It does not screen for disease. A low VO2 max result is not a diagnosis of anything — it is a starting point for improving cardiorespiratory fitness. A low resting metabolic rate result is not a clinical finding — it is a real calorie baseline that replaces a formula estimate.

If you have a specific health concern, see your physician. The Elysian Institute’s medical team can also advise on whether metabolic testing is appropriate for your situation before you book.

— The Test

What happens during the test

There are two tests. A resting metabolic rate test and a VO2 max test. They can be done separately or together depending on your goals. The Elysian team will advise which is appropriate when you book.

1
You wear a soft mask connected to the analyzer

The mask is not enclosed. You breathe normally. It captures the gases you exhale and sends them to the PNOE analyzer for continuous measurement.

2
Resting metabolic rate test: sit or recline quietly for 10–15 minutes

You sit or recline in a calm room while the analyzer records your breath at rest. The result is your true resting calorie burn — no formula, no estimate.

3
VO2 max test: a progressive exercise ramp until you reach your limit

You walk, run or ride a bike. The resistance or speed increases in stages. Gas is captured continuously throughout. You stop when you reach your limit. The result is your maximum aerobic capacity and the training zones derived from it.

4
The analyzer is calibrated before every test

Calibration is not optional. A calibration check before each session ensures the gas measurements are accurate and the results are reliable.

5
You receive a full report and go through it with someone

You sit down with a member of the Elysian team after the test and go through what the numbers mean for your training. You leave with a report and a clear plan.

— Before You Come In

How to prepare

Preparation matters more for a metabolic test than for most fitness assessments. The test is measuring your physiology at a specific moment — and anything that shifts your resting state shifts your result. Follow the Elysian team’s specific instructions when you book; these are general guidelines.

🍴
No food for 3–4 hours before an RMR test

Digestion raises your metabolic rate above true resting. For a resting metabolic rate test, fast for at least 3 to 4 hours beforehand.

Avoid caffeine, nicotine and stimulants

All stimulants elevate resting metabolic rate. Avoid coffee, tea, pre-workout supplements and nicotine on the day of the test.

🏃
No hard exercise on the day of the test

Exercise elevates metabolic rate for hours after you stop. Save the workout for after the test, or schedule the test on a rest day.

🧠
Arrive early and sit quietly

Arriving rushed or stressed changes the reading. Arrive a few minutes early, sit down and let your body return to its resting state before the test begins.

👢
Wear exercise clothing for a VO2 max test

You will be walking, running or cycling. Dress accordingly. Bring appropriate footwear.

📋
Bring your medication list

Bring a list of any regular medications and supplements to discuss with the Elysian team before the test starts.

— Understanding Your Results

How to read your results

The most actionable outputs from a metabolic test are your measured training zones and your resting metabolic rate. Everything else flows from those two numbers.

Your measured training zones very often differ meaningfully from the ones an age-based formula would have given you. That gap is usually why training felt wrong, plateaued or produced results slower than expected. Formula zones assume a population average. Your measured zones are specific to your cardiovascular system as it is right now.

Your resting metabolic rate gives you a real calorie baseline instead of an estimate. If your calorie target has never seemed to match your results, the measured RMR is where to look first. A number 200 or 300 calories below a formula estimate is not unusual, and it explains a lot.

On retest, the most meaningful change to track is whether your VO2 max has risen and whether your fat oxidation crossover point has shifted upward — both are signs of improving fitness. Your resting metabolic rate should be stable unless body composition has shifted significantly.

— Who It Is For

Is this test for me?

Metabolic testing is useful any time the standard formulas are not working. It is especially useful for:

  • Anyone who has plateaued despite consistent training and cannot work out why.
  • Anyone training for a specific event who wants zones based on their actual physiology rather than an age formula.
  • Anyone whose calorie target has never seemed to produce the expected result.
  • Anyone who has been training for years and wants to know their true aerobic baseline.
— Retesting

How often to retest

Every 3 to 6 months, or after a significant block of training.

A retest shows whether your resting metabolic rate has shifted and whether your training zones have changed — both of which happen as cardiorespiratory fitness improves. If you are working toward a specific event or season, schedule a retest at the end of each training block.

— Frequently Asked

PNOE metabolic testing — questions answered

What is PNOE metabolic testing?

PNOE is a medical-grade metabolic analyzer that measures how your body produces and burns energy by analyzing the gases you exhale — specifically oxygen consumption and carbon dioxide production. From those two measurements it calculates your resting metabolic rate, the ratio of fat versus carbohydrate your body burns at different intensities, your VO2 max and personalised training zones based on your actual physiology.

Where can I get metabolic testing in the Flathead Valley?

Montana Athletic Club in Bigfork offers PNOE metabolic testing through the on-site Elysian Institute at 850 Holt Drive — the only location in the Flathead Valley offering this level of metabolic analysis. Members travel from Kalispell, Whitefish, Columbia Falls and Polson specifically for this test.

What is the difference between a VO2 max test and a resting metabolic rate test?

A resting metabolic rate test is done sitting or reclining quietly for 10 to 15 minutes. The result is a precise calorie baseline — how many calories you burn simply existing. A VO2 max test involves a progressive exercise ramp that gets harder in stages until you reach your limit. The result is your maximum aerobic capacity and your true training zones.

How should I prepare for a metabolic test?

Do not eat for at least 3 to 4 hours before a resting metabolic rate test. Avoid caffeine, nicotine and stimulants. No hard exercise on the day of the test. Arrive early and sit quietly before starting. Wear exercise clothing for a VO2 max test. The Elysian team will give you specific instructions when you book — follow theirs over any general guidance.

Does metabolic testing measure my hormones?

No. Breath analysis measures gas exchange — specifically oxygen and carbon dioxide. It does not measure hormones and cannot assess thyroid function, cortisol or estrogen. PNOE is not a diagnostic test and a result is not a diagnosis. For hormone-related testing, the Elysian Institute’s blood panels are the relevant option.

How often should I retest?

Every 3 to 6 months, or after a significant training block. Retesting shows whether your resting metabolic rate has shifted and whether your training zones have changed — both of which happen as fitness improves.

— Related Services

Pair your metabolic data with the full picture

InBody Body Composition

See exactly what your weight is made of — muscle, fat and body water. Pair with your RMR for a complete energy and composition baseline.

Full InBody guide →
Certified Lab Blood Work

Drawn on site through the Elysian Institute. Adds the internal biomarker picture that breath analysis cannot provide.

Blood work details →
Personal Training

Your trainer can use your measured training zones directly in your program. No more guessing what “moderate intensity” means for you.

Meet the trainers →
Health Technology Hub

Overview of all three analysis tools available at the MAC and how they fit together.

Health Technology overview →

The Montana Athletic Club is a fitness and wellness facility, not a medical provider. Testing offered at the MAC is for fitness and wellness purposes and does not diagnose, treat, or rule out any medical condition. Please talk to your physician about any health concern, and before starting a new exercise program.

— Certified Lab Blood Work

Build your plan on real numbers.

Certified lab blood panels, drawn on site through the Elysian Institute.

At 850 Holt Drive, Bigfork — same building, same front door as the MAC.

— What It Is

An unusual combination in one building

Full lab blood panels are available in the same building as the MAC, processed by a certified laboratory, and ordered and reviewed by the Elysian Institute’s medical team. The Elysian Institute is a full clinical-grade facility operating at 850 Holt Drive — same address, same front door as the Montana Athletic Club.

The MAC is a fitness and wellness facility. Elysian is the medical provider. The distinction matters because it means the blood draw, the panel selection and the result interpretation all belong to qualified clinical professionals, not gym staff.

For training purposes, why does this matter? Body composition testing measures structure. Metabolic testing measures energy use. Blood work shows the internal picture — the markers that neither of the other two tests can reach. Having all three available under one roof is unusual for a health club anywhere in Montana.

Drawn on site — no separate lab trip

The Elysian clinical team performs the draw at 850 Holt Drive. The sample goes to a certified laboratory for processing.

Ordered and reviewed by Elysian’s medical team

Panel selection and result interpretation belong to Elysian’s qualified clinicians. MAC staff are not involved in the clinical process.

Pairs with composition and metabolic testing

InBody shows your body’s structure. PNOE shows your energy use. Blood work adds the internal markers. Together they represent a complete physiological picture.

— The Process

What happens, step by step

1
You speak with the Elysian team about which panel is right for you

The Elysian medical team decides what panel is appropriate based on your situation and goals. That decision belongs to them, not to the MAC and not to you alone.

2
Blood is drawn on site by Elysian’s clinical staff

The draw is performed by qualified clinical professionals in Elysian’s facility at 850 Holt Drive. It takes a few minutes.

3
The sample goes to a certified laboratory for processing

Samples are processed by a certified external laboratory. Results are not instant — turnaround time varies by panel; the Elysian team will advise.

4
Results come back and you review them with the Elysian team

The Elysian medical team goes through your results with you. They interpret the numbers. This is a clinical conversation — it is not something MAC staff can participate in.

5
You can choose to share relevant findings with your MAC trainer

If you train at the MAC and want your program to reflect what your results show, you can choose to share the relevant parts with your trainer. That conversation is between you and your trainer — Elysian does not share your results with MAC staff without your consent.

— Before Your Appointment

How to prepare

The Elysian team will give you specific preparation instructions when you book. Their instructions take priority over anything general on this page, because preparation depends on the specific panel ordered.

🍴
Most panels require fasting

Typically 8 to 12 hours, but this depends on the panel. Confirm with Elysian when you book.

💧
Drink water unless told otherwise

Stay hydrated. Do not restrict water unless the Elysian team specifically advises otherwise.

📋
Bring a list of medications and supplements

Bring a complete list of everything you take regularly — prescription medications, supplements, vitamins. This matters for accurate interpretation.

🌞
Schedule morning appointments where possible

Several markers vary through the day. Morning appointments, before normal daily activity begins, tend to produce the most consistent baselines.

Follow Elysian’s instructions above all else

The Elysian team knows which panel you are having. Their preparation guidance is specific to your situation.

— Your Results

Who reads your results

Blood work interpretation is a clinical act. The Elysian Institute’s medical team goes through your results with you in full. They explain what each marker shows, what the numbers mean in your context and what, if anything, warrants follow-up with your own physician.

MAC staff are not involved in reviewing, interpreting or advising on blood work results. The front desk can direct you to the Elysian entrance at 850 Holt Drive, but the clinical conversation belongs to Elysian’s team.

If something in your results is relevant to how you train — and you want your MAC trainer to know about it — you can choose to share it. That decision is entirely yours.

— Who It Is For

Is this right for me?

Blood work is useful for anyone who wants their training and nutrition decisions grounded in internal data rather than assumption. It is especially relevant for:

  • Anyone combining it with metabolic testing and body composition for a complete baseline at the start of a new program.
  • Anyone who wants to retest periodically and see the direction of travel as training and nutrition change.
  • Anyone who prefers their trainer to have real data to work from rather than starting from assumptions.
— Retest Timing

How often to retest

Retest timing is a clinical decision. The Elysian team will advise based on the panel and your individual situation.

The MAC does not publish a recommended retest interval for blood work. What the right interval looks like depends on what was found, what has changed and what the Elysian medical team recommends for you.

— Frequently Asked

Blood work at the MAC — questions answered

Can I get blood work done at my gym?

At the Montana Athletic Club, yes. The Elysian Institute at 850 Holt Drive offers certified lab blood panels drawn on site. The draw is performed by the Elysian clinical team, not MAC staff. The MAC is a fitness facility; the Elysian Institute is the medical provider.

Who performs the blood draw?

The Elysian Institute’s clinical staff perform the blood draw. The Montana Athletic Club is not involved in the clinical process. The MAC provides the building; Elysian provides the medical service.

Do I need to fast before a blood draw?

Most panels require fasting, typically 8 to 12 hours, but it depends on the specific panel the Elysian team orders for you. Confirm with Elysian when you book and follow their instructions, which take priority over any general guidance on this page.

Who reviews my results?

The Elysian Institute’s medical team reviews and goes through your results with you. Blood work interpretation is a clinical act that belongs to qualified medical professionals. MAC staff are not involved in reviewing or interpreting results.

Do I need to be a MAC member?

No. The Elysian Institute at 850 Holt Drive serves its own patients independently of MAC membership. Contact Elysian directly to find out what is required for your visit.

How do I book a blood draw?

Book directly through the Elysian Institute at elysianmt.com or by contacting the Elysian team. The MAC front desk can point you to the Elysian entrance, but bookings go through Elysian.

— Related Services

The complete health baseline

PNOE Metabolic Testing

Measure resting metabolic rate and VO2 max through breath analysis. The energy-use layer to pair with your internal markers.

Full PNOE guide →
InBody Body Composition

See muscle, fat and body water in under 60 seconds. The structural layer that completes the picture.

Full InBody guide →
Personal Training

When your trainer has real data to work from, your program becomes specific to your actual physiology.

Meet the trainers →
Health Technology Hub

Overview of all three analysis tools and how they fit together.

Health Technology overview →

The Montana Athletic Club is a fitness and wellness facility, not a medical provider. Testing offered at the MAC is for fitness and wellness purposes and does not diagnose, treat, or rule out any medical condition. Please talk to your physician about any health concern, and before starting a new exercise program.

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