Add Yahoo as a preferred source to see more of our stories on Google. Ever skip the gym for a few days… and suddenly realize it's been three weeks? Whether it was work, travel, injury, or life just ...

Changing your rep range and your workout intensity can help you build more muscle, says an exercise scientist with decades of ...

Forget the six-pack—real core strength at 60 is about stability, balance, and independence. Take this three-move trainer challenge to see how your torso measures up for the years ahead.

Upper-body strength exercises for women over 55, with NASM trainer guidance. 4 quick morning moves at home.

The protein threshold for building muscle may be lower than you think.

Muscle loss, or atrophy, due to inactivity is common after illness, injury, hospitalization or falls, and becomes increasingly frequent with aging ...

Studies on the neurons of mice suggest our own human endurance may have more to do with the brain than our physique.