We talk to lots of runners—at workouts, expos and through email—and have noticed that far too many do not seem to understand the basic principle of work followed by recovery to improve their running.

Think of high-intensity interval training (HIIT) like baking: You need a precise amount of time in the oven along with a cooling-down period. In workout terms, that means balancing intervals of more ...

Magnesium is everywhere in fitness supplements, but not all forms work the same. Here’s how to choose the right type for ...

Are you sabotaging your progress with poor recovery? A certified trainer reveals the biggest mistakes and how to fix them Nasha is a Managing Editor for CNET, overseeing our sleep and wellness ...