What's the first thing that comes to mind when you think about the words twitch and muscle? Spasms, perhaps. You'd hardly be alone in thinking that. But when it comes to fitness, it's most commonly ...

Everyone is familiar, at least hand-wavingly, with the distinction between slow-twitch and fast-twitch muscle-fiber types. The former are great for running marathons; the latter are ideal for ...

In layman's terms, contrast training is heavy resistance work followed immediately by an explosive movement. The result is a ...

A few years back, Golf Digest Best Young Teacher Steve Buzza (above) authored a terrific article on techniques that boost swing speed. His message is to give it all you got when you swing the driver.

Tsukuba, Japan—Muscle fibers, which constitute skeletal muscle, are classified into two main types: slow-twitch (Type I, red muscle) and fast-twitch (Type II, white muscle). Slow-twitch fibers are ...

Repeat after us: A strong runner is a fast, less injury-prone runner.

Time under tension (TUT) is a weightlifting technique designed to build muscle mass by increasing the time muscles spend activated during an exercise. We cover if it works and what its benefits are.