So you just got your VO2 max number by charting it on your watch, estimating your number at home, or even heading to a lab for a more formal test … but now what? You have that shiny number in hand, ...

HIIT is commonly performed at about 80 percent of peak heart rate, while sprint intervals are more of an “all-out” effort designed to get you to 100 percent of your VO2 max, the researchers noted.

Scientists have long known that people living at high altitudes, where oxygen levels are low, have lower rates of diabetes ...

You can count macronutrients with apps or a written food diary. Learn how to count macros if you’re trying to lose weight or gain muscle.