DEXA SCAN · VO₂ Max · Heart Rate Zones · Metabolism · Biomarkers
You're doing more than ever for your health. DexaFit is the foundation underneath it all: your lean mass, visceral fat, bone density, VO₂ Max—the numbers behind how strong you are, how well you perform, and what's quietly aging you.
Your Body's True Age
What DexaFit Revealed
Lean Mass
154 lbs
ExcellentVisceral Fat
0.41 lbs
GoodVO₂ Max
85th %ile
ExcellentBone Density
+1.2 T-score
ExcellentHow It Works
Scales, mirrors, and wearables are daily signals. Fast and convenient, but built for estimates. DexaFit is your ground truth.
DEXAFIT SCAN
DEXA scans are the clinical gold standard for body composition analysis. Discover your lean mass, fat mass, bone density, and visceral fat: the four numbers that drive performance, weight loss, and longevity.
VO₂ Max Test
VO₂ Max is one of the strongest predictors of how long, and how well, you'll live. Train against your real number, not a wrist guess, and add years to your life.
RMR Test
Your metabolism is the number every diet, plan, and plateau is built on. DexaFit measures yours, breath by breath, so every calorie target fits the body actually burning them.
Real Users. Real Stories
See what knowing your numbers with DexaFit looks like.
Five questions, and we'll help build your plan.
Who It's For
What You Learn
Fat mass. Lean mass. Visceral fat. Bone density. Measured by region. Different risks, different metabolisms, different needs, all from one scan.
VO2 Max measures how efficiently your body uses oxygen. It's the strongest predictor of all-cause mortality ever studied. Stronger than smoking, blood pressure, or cholesterol (Mandsager et al., JAMA 2018).
Visceral fat wraps around your liver, kidneys, and heart. It releases inflammatory signals around the clock. DEXA is the only clinical-grade tool outside a hospital that actually measures it.
RMR measures exactly how many calories your body burns at rest. Online calculators can differ by 20–30%. That gap explains why diets fail, plateaus happen, and why eating less doesn't always work.
Osteoporosis has no symptoms. No warning signs. The first sign is often a fracture. By the time it shows on a regular X-ray, you've already lost significant density.
Testosterone, ApoB, HbA1c, vitamin D, and more. The inputs underneath the numbers your DEXA scan, VO₂ Max, and metabolism reveal, so the full picture comes together in one place.
See My Numbers
Did you knowPound for pound, muscle is dense and compact like a hockey puck, while fat is bulky like a small football—and the visceral kind wraps around your organs. Same weight on the scale, completely different bodies.
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A DEXA scan measures body fat to ±1–2%; no scale or calculator can. Body fat % alone misses visceral fat—the fat around your organs (see the Metabolic Shield tab). Percentiles derived from the DexaFit database of users across 41 states and 4 continents.
Did you knowAfter a meal, your muscles soak up most of the sugar in your blood—insulin is the key, and muscle is the room it goes into. More lean mass and less visceral fat clears that sugar faster, before it can do harm.
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We use log₁₀(lean mass ÷ visceral fat) because the raw ratio swings wildly when visceral fat is low; the validated risk lines sit on the log scale. Insulin resistance peaks below log 1.80 and flattens above 2.50—past that, more buffer adds little (Shao et al., Front. Endocrinol. 2023). This tracks visceral fat, the metabolically harmful kind, not total body fat. Muscle clears most post-meal glucose (DeFronzo & Tripathy, Diabetes Care 2009). Educational, not a diagnosis. Percentiles from the DexaFit database of users across 41 states and 4 continents.
Did you knowYou can last weeks without food and days without water, but only minutes without oxygen. VO₂ max measures how efficiently your body extracts and burns oxygen—a window into your heart, lungs, and mitochondria, and one of the strongest predictors of how long you'll live.
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In 122,007 adults, the least-fit quartile had ~5× the all-cause mortality of the fittest—a larger risk than smoking, diabetes, or heart disease, with no upper limit of benefit (Mandsager, JAMA Netw Open 2018). Each +1 MET (~3.5 ml/kg/min) is associated with ~13% lower mortality (Kodama, JAMA 2009). Associations in populations, not personal predictions. Percentiles from the DexaFit database of users across 41 states and 4 continents.
What People Say
Trusted since 2011 as the gold standard for body composition, fitness, and metabolic testing worldwide.
"The DEXA scan gave me precise body composition and bone density data, and the RMR test provided personalized metabolic insights I can actually use. If you want real numbers to guide your health journey, this was absolutely worth it."
"The representative's expertise and clear explanations made the experience smooth and highly educational. I left feeling empowered and motivated with a much better understanding of my body composition and overall health."
"I recommend you do this regularly to see where your body is in terms of lean mass, body fat and bone density. One of the best locations to do the Dexa scan. I'm very happy with my results."
"When I walked in they knew my name. The staff accommodated me and did both tests back-to-back. It was great to compare the DEXA results to my home body composition measurements."
"Carrie thoroughly explained our results. It was really interesting and educational to see what the total body composition scan showed. This is going to help me set goals for my fitness and diet."
"I learned a lot about my body composition and what can be improved upon from a quick 20 minute scan. This first scan is my baseline and will return in a few months."
"The actual dexa scan and RMR test were both quick and comfortable, followed by an informative assessment. Was very happy with my experience and will return for a follow up."
"The whole process was simple, fast, and painless, and all my results were ready right away and explained in great detail. I'm a big fan of the app."
"They explained my test results immediately and clearly. They provided great insight to my overall health and body composition."
"Rob was incredibly informative, clear, and insightful throughout the entire appointment. I walked away with valuable data about my body composition that I can actually use to guide my health and fitness goals."
"She went over my results with me and gave me advice on how to improve my bone health and body symmetry. I heartily recommend anyone who wants to know more about their body composition to get their DEXA scan done here."
"Sean was great. Super friendly, enthusiastic, very thorough and knowledgeable. Booking the appointment was super easy too, and communication is very good and prompt."
"Appointments are on time and quick. The location is easy to get to. If you're looking to get a DEXA scan for body composition, I would highly recommend using this company."
"Carrie was knowledgeable and explained all the scans before we did them. Super helpful to know exactly what my body composition is! Will definitely be back in 6 months."
"The scan is quick and provides such useful information on bone density, and fat and lean mass composition. You should definitely come here, and I will be back soon to get another scan to check my progress."
"I love that you can get your dexascan, resting metabolic rate AND a proper VO2max test all in one place. This is my third time there and I love it!"
"Laura was very chill and kind but still very efficient. This was my second Dexa scan and VO2 max test to track fitness and body composition. I'm an endurance athlete who wants to track progress year to year."
"I've gotten a VO2 max test done here two years in a row. 10/10 experience all around. I'd recommend DexaFit Nashua to any runner looking to improve and gain true insight about their fitness."
"Nas was able to explain the data results in a way I could understand. Recommend for anyone curious about their fitness but especially athletes!"
"Carrie was excellent! She explained everything as we went along and was very enthusiastic and supportive. I would highly recommend DexaFit for both experienced athletes or those who are just starting out."
"The technicians were very friendly and knowledgeable. I learned so much more about myself as an athletic middle-aged woman. Highly recommend!"
"I am an athlete and recently turned the big 5-0 and was recommended to get a bone density scan. They are excellent people and knowledgeable about the test measures and outcomes."
"DexaFit is a must for anyone interested in improving overall health as well as performance. The result metrics are game changers for me as an older athlete looking to shed weight and improve performance intelligently."
"We did the VO2 max test, very cool! We learned a lot and finally have very accurate zones to go off of as elite athletes. Will definitely recommend to all athletes. Garmin is way off!"
"I was intimidated because I thought the testing was just for athletes but I learned so much about myself and my body. I now know exactly what I need to work on and feel positive about making changes for my health."
"The dexascan is a game changer and getting a VO2 max and RMR test done will help nail my nutrition leading into my next race and what my true zones are, completely removing all the guesswork."
"I was very pleasantly surprised by the results, even as a 71-year-old man, blown away really. Longevity experts like Peter Attia agree that VO2 Max is the best indicator of your longevity trajectory there is."
"Staff was very knowledgeable and professional. I felt like I could ask lots of questions and take the time I needed. Must do for anyone who cares about their longevity."
"Just did my first DEXA body composition scan, VO2 max test, and mobility assessment. The data was eye-opening. Chris broke down my body fat, lean mass, visceral fat, and cardiovascular fitness into actionable steps for performance and longevity."
"Laura's knowledge was so helpful post-test when she explained all the numbers. I wholeheartedly recommend DexaFit to anyone who wishes to gain a greater understanding of these critical metabolic and longevity indicators."
"Stu spent a lot of time with us afterward to explain all the results. These two tests provided us with valuable insight on our health and how we can tweak our routine to maximize longevity."
"I had a fantastic experience at DexaFit Detroit. Rob was incredibly informative and insightful."
"I am 49 (turning 50 later this year) so to my surprise when Carrie told me my biological age was 25 it was the best news a mom could hear on Mother's Day!"
"Already scheduled my next session. Really nice people and super valuable information for improving overall health and longevity."
"My wife and I are older and concerned about our longevity. We both had scans today. I would recommend this to everyone, especially if you are concerned about maintaining or improving your health."
"VO2 max and mass mass are both significant predictors of longevity and healthspan. If your provider doesn't order these tests for you (most don't), it's worth it to visit DexaFit to get your numbers and see where you stand."
"My first visit was a 10/10. The owners both involved in counseling me along the way to make sure everything went just right. I'm psyched to make meaningful improvements and head back in next year."
"The reports afterwards were comprehensive and educational. Great baseline information at a price that makes it manageable to return for progress reports. There was NO pressure to buy things."
"My numbers improved in all areas. It was so empowering. The way the numbers are aggregated into a combined score is equated to a 'biological age.' I certainly enjoyed getting younger!"
"My 2nd annual Body Scan. The facility is clean, process is efficient, review is enlightening. Making this part of my routine annual testing is just one more healthy habit as I work towards aging backwards."
"As a Doctor of Physical Therapy, I can't recommend this enough and I will be telling all my patients. This should be the standard of care for yearly physicals!"
"If you're looking for another tool in your fitness journey, this is the place. The 3D body scan is very insightful, giving you an in depth look at percentages for lean mass, body fat and bone density."
"It gave me valuable insight into my bone density, body composition, and overall health. Highly recommend for anyone wanting a clear snapshot of their wellness."
"Had a great experience to get my baseline bone density and fat %. The process was quick with a thorough results explanation after."
"I found the information to be more than I even expected. It will be extremely useful in creating a plan to improve my bone density as well as body composition."
"I had three tests (bone density, movement analysis and VO2max). I gained a whole new perspective and plan with how to continue to improve my health."
"The owners are friendly, professional, and knowledgeable. Camille even went out of her way to send a research article on osteoporosis, bone repair, and strength training. Had such a great experience that I also referred my boyfriend and father here."
"Highly recommend, especially for women 30+ who want to stay ahead of potential bone density issues BEFORE they become a problem. I may have gone years without having this info otherwise."
"Doctors wanted to put me on osteoporosis medication when I was in my 40s, no way was I doing that. My bone density has improved! I will be adding this into my health plan."
"The scan was quick and efficient, taking only about six minutes. I appreciated the opportunity to get such a detailed baseline reading of my bone density, mass mass, and other important health metrics."
"I have been on a GLP-1 for several years and having the DEXA scan is a great way to maintain progress and keep up mass mass. Laura was super helpful and encouraging."
"I am focused on building mass and want to make sure as I lose weight I don't lose mass. I would highly recommend all women get a DEXA scan so you have a baseline of your bone mass."
"Carrie is knowledgeable about diet and fitness and can provide good advice for those starting their fitness journey. I would return after completing another fat loss phase."
"The info you get from the scan is great to help kick off your weight loss goals. I really appreciate them taking the time to go over your numbers at the end of the session."
"I thought I was 21% body fat based on my scale at home when in reality I was 34%. I was 'skinny fat' but didn't even know it. This was a very eye opening reality check."
"It was eye opening to see the scan and the results. I wished I had done this at the beginning. It's amazing to have actual results and to see what my true fitness levels are. AMAZING!"
"I recently lost a fair amount of weight and wanted to know where I stood. DexaFit gave me excellent feedback on my weight loss and future fitness goals."
"This is one of the few places that has RMR testing which I really needed to help determine my caloric deficit. Will definitely be returning periodically for further assessments."
Five questions. We'll show you which tests matter most for your goals and the closest place to get them.
Quick Answers
Most of your health data is a guess. Wearables estimate, calculators approximate, the scale hands you one blunt number. DexaFit measures. In a single visit you get a clinical-grade DEXA body composition scan, a VO₂ Max test, and an RMR metabolism test: the real numbers underneath your strength, your metabolism, and your longevity. That's your ground truth. Everything else gets calibrated against it.
If you take your body seriously, DexaFit is for you. You may have first heard it from Tim Ferriss in The Four-Hour Body, seen DexaFit featured on Netflix's You Are What You Eat, or read about it in the longevity books and podcasts you already follow. It's the same gold-standard technology NASA uses to monitor astronauts and elite athletes use to stay on top of their sport.
Because these numbers can't be faked, and they keep each other honest. A lab value can be normalized in a week. Body weight can be cut overnight. The right drug or supplement can drive fast weight loss, or quick gains in muscle and strength. But a shortcut almost always costs you somewhere else: lose weight too fast and lean mass goes with it; chase size and strength and visceral fat creeps up or your VO₂ Max slips. Real progress moves the metrics that matter most, lean mass, visceral fat, bone, and VO₂ Max, in the same direction at once. Move them together, and you didn't game a result. You built something that lasts.
DexaFit started in 2011 with one goal: take the clinical-grade testing that lived inside hospitals and put it in the hands of everyone serious about their health. Today it runs across four continents and 40+ states. Wherever you go, the test, the app, and your numbers go with you. Read the full story →
Where you truly stand. Your lean mass and where it sits. The visceral fat wrapped around your organs. Your bone density. Your VO₂ Max, the single strongest predictor of how long you'll live. And the labs underneath it all. Not a wellness score or a vibe: the actual numbers that decide how strong you stay and how long you last, with personalized targets to move them.
The clearest picture of your body you'll ever get. A DEXA scan separates fat from lean mass from bone and maps each one region by region, at ±2% accuracy, the clinical gold standard. Two people can weigh the exact same and be built completely differently, so the scale was never going to tell you who you are. DEXA does, and shows you exactly where to put the work. About 8 minutes, fully clothed, results the same day. Read more about the DEXA scan →
VO₂ Max is how much oxygen your body can actually use, and it's the single strongest predictor of how long, and how well, you'll live: stronger than smoking, blood pressure, or cholesterol (Mandsager, JAMA 2018: 122,007 patients, a 5× mortality gap between the least and most fit). Your watch estimates it. DexaFit measures it directly, then hands you the real number and the zones to train against. Raise it, and you add years. Read more about VO₂ Max testing →
Your metabolism is the number every diet and calorie target is built on, and most people are working off a formula that's a guess, off by 20% or more. That's why plans stall and "eat less" stops working. DexaFit measures your real metabolic rate from a few minutes of quiet breathing, so you finally know how much your body burns and can eat for the body you actually have. Read more about RMR testing →
Yes, two ways, and they're not the same. Every total-body DEXA scan includes whole-body bone density, with T-score and Z-score across spine, hip, and total body. That's where most people start. For a deeper look, select locations offer DexaStrong, a site-specific scan of the hip, lumbar spine, forearm, and wrist, built for anyone serious about osteoporosis risk or fracture prevention. Bone loss is silent and starts earlier than most expect, so the baseline you take today is the one you'll be glad you have. See DexaStrong →
Your scale gives one number. Your wearable estimates from heart rate and pace and can be off 10 to 20%. DexaFit measures directly: ±2% on body composition, and a mask that reads the oxygen you actually use for VO₂ Max. Same metrics your devices approximate, except these are real. Use the daily tools for daily signals. Use DexaFit for the truth.
Find your nearest DexaFit and book. The visit runs about 20 to 45 minutes, depending on what you schedule: an 8-minute DEXA scan, plus your VO₂ Max or RMR test. Your results are available the same day, with a real person walking you through personalized targets and a clear read on where you stand, ready to act on with your doctor, your trainer, or on your own. Get DexaFit now →
Absolutely, that's the point. DexaFit isn't a plan, it's the ground truth you build one on. Your full report exports as a PDF in clinical language your physician, trainer, or nutritionist will recognize, so the conversation starts from real numbers instead of guesses. Bring it to your doctor, your coach, or your own ambition. The data is yours.
Every test is grounded in peer-reviewed evidence: JAMA, NEJM, ACSM, IOF. But DexaFit goes further: it sits on one of the largest clinical-grade body composition and metabolic datasets in the world. So your numbers aren't read against a textbook average, they're benchmarked against real measurement at scale. Explore DexaFit Research →
Yes. DexaFit partners with physicians, longevity clinics, and integrative-medicine practices to bring clinical-grade body composition, VO₂ Max, and metabolic testing straight to patients, the objective baseline modern care has been missing. DexaFit handles the equipment, software, and training. You focus on care. For medicine & research →
Yes, and the best in the game already have. DexaFit works with gyms, trainers, and athletic teams, including professional athletes across nearly every sport, to put clinical-grade data on body composition, VO₂ Max, and metabolism in their hands. Your members stop guessing and start training to real numbers, and you become the place that proves results. For gyms & trainers → · For athletes & teams →
If you're building a wellness, longevity, or fitness business, DexaFit is the most credible, data-driven offering you can put at the center of it. Run it as a standalone location or layer it into something you already operate. DexaFit brings the brand, the app, the training, and the full clinical stack. You bring the vision. Explore Partnership or Powered-By →
Yes, and it's one of the few that pays for itself. Most corporate wellness budgets fund programs nobody can measure. DexaFit gives employees a real baseline on the metrics that actually drive long-term health, visceral fat, cardiorespiratory fitness, metabolism, and gives employers something rare: outcomes you can track. Healthier teams, lower long-term healthcare costs, and a benefit people actually use. Corporate wellness →
Extensively. DexaFit serves as the measurement backbone for contract research organizations and academic teams, with countless studies run across body composition, metabolic health, and performance. From participant recruitment and screening to standardized, clinical-grade endpoint data across dozens of sites: one protocol and consistent measurement, everywhere you need it. Clinical research partners →
Know exactly where you stand, and your north star for where to go next.
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