Boost your endurance and strength, all at once.

For your speed workout, try a fartlek run/walk: After a walking or easy running warmup, run hard for 30 seconds or as long as ...

A recent study from Australia suggests that high intensity interval training may be optimal for body composition in older adults, by helping to lose fat while preserving muscle.

Here’s your excuse not to work out today. A single session of high-intensity exercise can disturb the body’s main stress hormone, leading to less activity after the workout, a lower body temperature, ...

No equipment needed ...

Add Yahoo as a preferred source to see more of our stories on Google. Couple power walking outside in the park on a cold day. (Getty Images) This month we will be alternating between HIIT walks and a ...

Plus, exactly how to get results from whatever activity you love to do.

When you drink a protein shakes doesn't matter as much as how much protein you consume. Here's the latest research and expert ...

High intensity interval training could be the secret to staying young. — -- Exercising by doing interval training, not weight lifting, could be the secret to staying young, according to a new ...

This video follows a five minute high intensity football workout combining strength, ball control, and agility drills. The ...

A single session of high-intensity exercise can disturb the body's main stress hormone, leading to less activity after the workout, a lower body temperature, and weight gain, a new study of mice finds ...