DEXA · VO₂ Max · Metabolism · Biomarkers
Lean mass. Visceral fat. Bone density. VO₂ Max. You're doing more than ever for your health—DexaFit shows you what's working, what isn't, and what may be quietly aging you faster than you think.
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
Your scale, your watch, your bloodwork — they aren't useless, but they miss what matters. Three clinical tests in one visit reveal what your body is actually doing.
DEXA Scan
Your scale shows one number. DEXA shows the four that actually drive your health: fat, lean muscle, visceral fat, bone. Finally know what's working, what isn't, and exactly where to put the effort.
VO₂ Max Test
Your smartwatch estimates. We measure. VO₂ Max is the single strongest predictor 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
Online calculators miss your real metabolism by around 20%. We measure it directly from your breath, so every calorie target actually fits the body burning them. Eat for the results you want, not someone else's average.
Not sure where to start?
Who It's For
Not sure what's right for you?
What You Learn
Not sure where to start? Take the 30-second quiz.
Most tools measure how you feel. DexaFit measures what's actually there—clinically, precisely, in 8 minutes. Tap a dot on the body or choose a metric below.
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).
Fat mass. Lean mass. Bone mass. By region. Two people can weigh the same and have completely different bodies—different risks, different metabolisms, different needs.
Visceral fat wraps around your liver, kidneys, and heart—releasing 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.
See My Numbers
Lean mass and body fat—measured precisely, not estimated. See how your composition compares to your age group.
Your lean mass acts as a metabolic buffer against visceral fat. The more lean mass you carry, the greater your body's capacity to process glucose—keeping visceral fat in check. Reducing visceral fat remains the goal, but lean mass is your defense.
VO₂ Max is the single strongest predictor of longevity. A 5× mortality gap separates the lowest and highest fitness quartile. Where do you stand?
What People Say
"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 muscle 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 muscle 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, muscle 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 muscle mass. Laura was super helpful and encouraging."
"I am focused on building muscle and want to make sure as I lose weight I don't lose muscle. 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."
Four quick questions. We'll show you which tests are most useful for your goals—and the closest DexaFit to book.
Quick Answers
DexaFit started in 2011 with a single goal: bring clinical-grade body composition, cardio fitness, and metabolic testing out of hospitals and into the hands of everyday people. Today DexaFit is a technology available across four continents and 40+ states — wherever you go, the test, the app, and the data follow you. Read the full story →
DexaFit measures what most providers estimate. In one visit you get a clinical-grade DEXA body composition scan, a VO₂ Max test, and an RMR metabolism test — plus an app that turns every number into a plan you will act on. No guesswork, no formulas, no "trust the wearable."
Find where to get DexaFit, book a visit, and your results land in the DexaFit app shortly after with a personalized plan you can share with your doctor, trainer, or nutritionist. Click here to get DexaFit now →
A DEXA (Dual-Energy X-ray Absorptiometry) scan is the clinical gold standard for measuring body composition. In about 8 minutes it gives you precise readings on fat mass, lean muscle, visceral fat, and bone density — broken down region by region at ±2% accuracy. Read more about the DEXA scan →
Smart scales and bioimpedance tools typically miss with an error margin of 10% or more, and they only return a single whole-body number. A DEXA scan measures composition at ±2% clinical accuracy and shows you the breakdown by region — legs, arms, trunk — so you can see exactly where you're gaining muscle or losing it.
Yes. DEXA uses a very low dose of X-ray — typically less than the radiation you'd absorb on a transcontinental flight. The scan is non-invasive: you lie still on a comfortable padded table for ~8 minutes, fully clothed.
Yes. Bone Mineral Density (BMD) is part of every DEXA scan, with T-score and Z-score readings across spine, hip, and total body. Especially important if you're going through perimenopause, on GLP-1 therapy, or want a longevity baseline.
If you'd like to go deeper, a DexaStrong site-specific bone density scan (hips, L-spine, forearm, wrist) is the next level. Click here to learn more →
The best time to know is before bone loss starts, not after. Bone loss can begin in your 30s and 40s without symptoms, and accelerates around perimenopause and on GLP-1 therapy. A baseline now gives you something to compare against later, so you spot trouble years earlier than waiting for a fracture would.
Athletes, women approaching menopause, and anyone with a family history of osteoporosis benefit most from early baselines. Learn more at DexaStrong →
A DexaFit DEXA scan covers whole-body bone density alongside fat, lean muscle, and visceral fat. It's the right starting point for most people.
DexaStrong is a deeper, site-specific bone density scan covering hips, lumbar spine, forearm, and wrist. It's built for anyone tracking osteoporosis risk, fracture prevention, or response to bone-loading interventions. See DexaStrong →
VO₂ Max is the maximum amount of oxygen your body uses during exercise — a direct measure of cardiovascular fitness. It's the single strongest predictor of all-cause mortality ever studied: a JAMA 2018 analysis of 122,007 patients (Mandsager et al.) found a 5× mortality gap between the least-fit and most-fit quintiles. Read more about VO₂ Max testing →
Anyone serious about longevity, athletic performance, or building a real fitness baseline. Athletes use it to dial in training zones with precision a wearable misses. Adults over 35 use it as a longevity benchmark to track and improve year over year.
Your wearable estimates VO₂ Max from heart rate and pace — it can be off by 10-20%. DexaFit measures it directly with a mask that analyzes oxygen consumption during a graded exercise test. Same number. Real result.
RMR (Resting Metabolic Rate) is the number of calories your body burns at complete rest — the foundation of your daily energy needs. DexaFit measures it directly by analyzing the gases in your breath, not by plugging your stats into a generic equation. Read more about RMR testing →
Generic calorie formulas miss by 20% or more — enough to derail any weight-loss, recovery, or performance plan built on top of them. Once you know your real RMR, every nutrition and training decision is grounded in what your body actually burns, not what an app guessed.
DexaFit partners with physicians, longevity clinics, and integrative-medicine practices to bring clinical-grade testing directly to their patients. We handle the equipment, software, and training — you focus on care. Learn how DexaFit fits medical & research practices →
If you're opening a new wellness, longevity, or fitness business — or expanding an existing one — DexaFit is the most credible, data-driven offering you can add. We support you with branded marketing, an app, training, and the full clinical stack. Explore Partnership or Powered-By options →
Yes. Gyms, trainers, and athletic teams use DexaFit to give members and athletes clinical-grade data on body composition, VO₂ Max, and metabolism. For gyms & trainers → · For athletes & teams →
You can become a DexaFit provider in more than one way. Some operators offer DexaFit as a full standalone location, others layer it into a practice or business they already run. Either path, you get the test, the technology, and the support that goes with it. Explore the options →
The DexaFit blog covers everything from GLP-1 and lean mass preservation to longevity zone-2 training and metabolic flexibility. Click here to read the blog →
About 30 minutes total: 8-minute DEXA scan, 15-minute VO₂ Max or RMR test depending on what you booked, plus a quick walkthrough of your results in the app. Click here for all services →
Every DexaFit test is grounded in peer-reviewed clinical evidence from JAMA, NEJM, ACSM, IOF, and other top-tier journals. We pair that with original studies drawn from one of the largest clinical-grade body composition and metabolic datasets in the world, so what you read isn't just borrowed science, it's measurement at scale. Explore DexaFit Research →
DexaFit Research is where the science behind the test lives, with original studies, plain-English guides, and curated evidence on body composition, metabolic health, and longevity. Visit DexaFit Research →
Yes. Your full report exports as a PDF from the DexaFit app and is built to be shared with your physician, trainer, dietitian, or longevity provider. The data is presented in clinical language your care team will recognize, so a conversation with your doctor starts from real numbers, not estimates.
Peer-reviewed studies typically work with focused cohorts and tightly controlled conditions, which is where the foundational science comes from. DexaFit adds a different layer: real-world measurements across a wide range of ages, demographics, and goals, collected at clinical-grade accuracy. Used together, the two give a fuller picture, the published science explains the mechanism, the dataset shows how it plays out in practice. Explore the data →
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