If you wear a running watch, you might have noticed a function that estimates your VO2 max score. If your running is in a good place, you might have seen this number rise over the past few months or ...

Jakob Roze, CSCS, is a health writer and high-end personal trainer. He is the founder and CEO of RozeFit, a high-end concierge personal training practice and online blog. VO2 max measures how much ...