Add Yahoo as a preferred source to see more of our stories on Google. Ever wish you could breathe easier and sustain more intensity mid-workout? You may have overheard the term "VO2 max" at the gym or ...

If you're a fitness fiend or working to improve your health, you're probably always looking for ways to run faster and farther, train harder and push your limits. You might even already track a number ...

VO2 max is more nuanced that you might think – so here’s how to know where your aerobic fitness really stands ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Ever wish you could breathe easier and sustain more intensity mid-workout? You may have overheard the ...