Fitness doesn’t stick with you forever, nor does it magically disappear all at once. But your absolute top gear is usually the first thing to go when your training stalls. Coming back after a two-week ...

Shakira's personal trainer Anna Kaiser shared the secret to her client's incredible physique and fitness at 49 – and it's not ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Running at the best of your ability is somewhat of a numbers game. To hit new PRs, you’ll want to keep ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Until recently, VO2 max testing has been inaccessible to most everyday athletes. Unless you had an in ...

Running to the best of your ability can feel like a numbers game. To hit new PBs, you’re probably under the impression that you should keep tabs on all kinds of ...

VO2 max seems like the biggest buzz word used in the running community right now—but why? What makes that number glaring back at you on your smartwatch so crucial, and why can’t runners stop talking ...

Add Yahoo as a preferred source to see more of our stories on Google. VO2 max testing requires a mask to measure oxygen intake and carbon dioxide output to determine your cardiovascular fitness. When ...

The test evaluates the maximum amount of oxygen the body uses during intense physical exercise.