For a muscle to continuously contract and relax, it needs adequate hydration, electrolytes, and oxygen. It also must be able ...

Endurance means a lot of different things to different people. To runners, it means being able to run for a long time, covering many miles. To weightlifters, it might mean being able to lift heavy ...

Muscular endurance is a muscle's ability to complete multiple repetitions ("reps") of a movement against resistance for an extended period. Muscular endurance improves athletic performance and the ...

Muscular strength also improves overall sports performance through increases in stability and strength in the prime mover muscles (or the muscles mostly in charge of motion in a joint), like your ...

You can reap the many health benefits of HIIT by exercising for a shorter — yet more intense — period of time.

Plenty of us are guilty of going to the gym, picking the heaviest weight we can find and lifting it for a small number of repetitions. While this might help us build bigger muscles, it doesn’t improve ...

When I’ve finished a long run, my leg muscles feel like they’re ablaze. By the last few seconds of planking, my abs feel like they’re burning and close to shaking. When the workout burn is real, it's ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When I’ve finished a long run, my leg muscles feel like they’re ablaze. By the last few seconds of ...

For people who don’t already exercise, short bursts of deliberate activity significantly improved cardiorespiratory fitness.

While we may refer generally to ourselves or someone else as fit, there are many components of fitness. It’s a general term that lacks the specificity you might need to improve in your particular ...