Find out how different heart rate monitors work, their pros and cons, and how to choose the right one for you

Lactate threshold is a good indicator of aerobic endurance, and can be a valuable training tool once you know it

There's only one real way to be sure

Stretching can increase your mobility, even if scientists don’t fully understand why – but is that always the right goal?

We present great workouts for hikers to take the sting out of those long ascents and have you powering on for days.