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Metabolic – RMR & Fitness -Vo2 max
Testing And Analysis

MetabAcheck is the Bay Area’s Premier Metabolic Testing Center for Weight Loss and Athletic Performance

Welcome to MetabAcheck

At MetabAcheck we recognize the many benefits that accurate metabolic (RMR) and Vo2max testing can provide. Whether you are interested in losing weight, gaining muscle, improving performance, or periodic measurement as an early warning to a slowing metabolism as you age, our tests and expert analysis provide a blueprint for maximum success.

Why Choose MetabAcheck RMR – Vo2max Testing?


MetabAcheck gives you the most accurate measurement of your resting metabolic rate (RMR) and Vo2max. We utilize what is recognized as the “Gold Standard” of metabolism measurement, indirect calorimetry using the Pnoe Gas Analysis System, to determine the exact number of calories your body utilizes per day at rest.

Expert Analysis

A metabolism test is only as good as the person you have analyzing your results. Many companies utilize a technician to administer AND analyze your results. With 21+ years of metabolism testing experience, physician, weight loss, and body transformation specialist Dr. Jay administers and analyzes ALL MetabAcheck tests.

Proven Results

We feel our client’s results speak volumes. So, we invite you to browse our gallery of former and current clients and athletes. Whether your goal is to lose weight, gain muscle, improve performance, or just maintain your current body composition, MetabAcheck can help.

Break Plateaus

There is nothing worse than putting in effort and not seeing results. Whether you’re working out hard at the gym or focusing your effort on diet, the bottom line is that if you don’t see results, you probably won’t keep it up for long. Frustrated, many of our clients come to us after having not seen results for months and even years! Metabolism testing can quickly and easily identify the cause of your plateau so you can make adjustments and start seeing results again!

Affordable, Fast, & Easy

Being healthy is definitely not cheap and time is money! So the last thing any of us can afford to do is waste time and money reaching our health and fitness goals. Luckily, for less than the cost of some gym memberships, you can now get better, faster results and finally bridge the gap between your effort and your success! Sit back, relax, and breath….it’s as simple as that. The test itself only takes ten (10) minutes.


No matter what diet (Weight Watchers, Jenny Craig, Nutrisystem, Keto, etc.) or fitness program (P90X, Crossfit, Zumba, 24hr Fitness, online personal training, etc.) you are currently doing, MetabAcheck metabolism testing can help. Let’s face it, none of these programs were designed specifically for YOU. MetabAcheck metabolic and fitness testing allows you to individualize ANY program in order to get the very best results possible!

Google Reviews

MetabAcheck Metabolism Testing And Analysis IconMetabAcheck Metabolism Testing And Analysis

San Francisco And Surrounding Bay Area

5.0 12 reviews

  • Avatar Jordan Kienzle ★★★★★ in the last week
    I did a VO2 max test with Dr. Jay which helped identify a few high impact underlying areas for improvement- none of which I had considered before the test. I found the entire process to be very valuable and seamless.
    Dr. Jay is incredibly
    … More knowledgeable and has the latest measurement technology. He also has the most relevant cycling equipment for testing purposes which gave me confidence in the testing protocol/results.
    The testing results were super interesting but the real benefit is Dr. Jay's further analyses and recommendations for improvement across the various areas. His guidance and explanations really gave me confidence in how I can make improvements and the appropriate action items.
    As somebody who is looking to maximize my performance in training and racing, and in general health and well-being, I found Dr. Jay's process and results to be well worth it. I'm excited to implement the recommendations and continue to improve my athletic performance.
  • Avatar Melanie Dalton ★★★★★ in the last week
    Dr. Jay is fantastic and I wish we would have found him years ago!! I have focused on health and wellness for many years now, doing my best to make adjustments as I went along, reading everything under the sun. The tests that Dr. Jay provides … More were incredibly informative and crucial to understanding my specific body needs; yet his deep dive into the reports and turn around of this information to understandable, actionable change is what is truly valuable. The information I received, I would not have been able to discover on my own. Further, without Dr. Jay’s interpretation of the data, I would not have made the accurate adjustments. Now I know that I am on the true best course to reach my fullest potential and health goals.
    Dr. Jay has an absolute wealth of knowledge and is truly passionate and excited about what he does, which shows in hs expertise and also the care and attention he provides to each individual (my husband has also gone through this process!). It is a great feeling to know we are truly on course this time and that we have Dr. Jay in our corner as we continue to progress. Thank you Dr. Jay!
  • Avatar Jodi McLean Yoga ★★★★★ 3 weeks ago
    Amazing experience! Priceless information! As a relatively healthy & fit 40 year old, I came to Dr Jay with a goal to be more generally aware of my overall wellness and more efficient in my excercise & nutrition regimen. I have … More been extremely interested in longevity & feeling my best. He helped me unlock things I feel have been holding me back from my highest potential for years! Dr Jay was extremely kind and communicative throughout the entire process. He took his time and we had fun with the information! Not only did he help me understand how my body is working, he showed me what I need to do to make necessary shifts in the right direction by creating a clear plan. I can’t wait to get started! HIGHLY RECOMMEND!!
  • Avatar Nicole PK ★★★★★ 4 months ago
    This testing provided so many valuable insights for my training moving forward. Dr Jay provided lots of comprehensive explanation and made sure that I was clear on all of results and the actions I needed to take to address problem areas. … More I will certainly continue to work with Dr Jay moving forward and plan to be tested again before the next phase of my training.
  • Avatar Ben Lindenmuth ★★★★★ 2 months ago
    Recently did the RMR and VO2max testing at Metabacheck. Dr. Jay translated the results into some changes I can make to work toward my goals. Really pleased with his willingness to explain everything and deep analysis of test results. … More

View Google Reviews

Our Services


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Testing &

Metabolic Testing In Action








Come visit us!

6:00 AM TO 6:00 PM Metabacheck Metabolism Testing And Analysis
700 A St., San Rafael, CA 94901
415-870- 5117

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