Discover how VO₂ Max testing and Zone 2 training can improve endurance, boost longevity, and transform your athletic performance—backed by real science.
VO2 Max
VO2 Max Calculator: Free Percentile by Age & “Fitness Age”
Free VO2 max calculator built on validated field tests. See your percentile by age and sex, get a fitness age, and learn when a mask VO2 test is worth it—then book with Composition ID.
Why Women May Reap More Health Benefits from Exercise than Men
The common phrase "exercise is...
VO2 Max Resources
The Power of VO2 Max Testing and Zone 2 Training: Unlocking Your Athletic Potential and Longevity
Discover how VO₂ Max testing and Zone 2 training can improve endurance, boost longevity, and transform your athletic performance—backed by real science.
VO2 Max Calculator: Free Percentile by Age & “Fitness Age”
Free VO2 max calculator built on validated field tests. See your percentile by age and sex, get a fitness age, and learn when a mask VO2 test is worth it—then book with Composition ID.
Why Women May Reap More Health Benefits from Exercise than Men
The common phrase "exercise is medicine" has been coined to underscore the importance of physical activity as a cornerstone of a healthy lifestyle. While it's universally acknowledged that everyone can benefit from exercise, emerging research suggests that women may...
Gym Workouts vs At-Home Workouts: Which will Survive Post-COVID-19?
When gyms closed last year, many of us were forced to master the at-home workout to keep in shape. Most facilities have now opened their doors fully or at limited capacity with shortened hours of operation, bringing in troves of folks who have been antsy to resume...
How to Know if You’re Overtraining
Can you work out too much? We tend to think more is better when setting fitness goals. Log more hours at the gym, schedule two-a-days, burn an extreme number of calories. While working harder may make sense logically to see results, there’s a danger that comes with...
What does Consumer Genetic Testing Say about Fitness and Trainability?
In our ever-evolving age of information, the promise of using DNA to answer many of our health questions incredibly intriguing. If we know which genes we have, and which genes we don’t have, we can know more about how to plan for the future. But is the science really...
Client Perspective: I Tried to Improve my VO2 Max and it Didn’t Go Well
Ryan Pfister, a CompositionID client in Washington, DC, documents his journey with VO2 max testing. This post was originally published on Ryan’s Medium page. Thanks for letting us showcase your journey, Ryan! I’ve been trying several different fitness experiences...
3 Rules For The Best Workout You’ve Ever Had
No matter what it is that you love to do – do it harder then you have done before. Look to make progress in some way during this “finish”. Maybe you go heavier, do more repetitions, or travel a particular distance in less time. The specifics of your challenge need not be complex. In fact, you’ll benefit most when they are personal, attainable, and beneficial to your long term goal.
Why Strong?
Strength is a word that holds a myriad of meanings, all of which depend upon what circle of individuals you find yourself standing among. For some, strength means a fistful of chalk and the sensation that accompanies pounds of iron bending within your grasp. Others may find similar awareness after the completion of a long workout or even just a long day.