power

The Basics: Muscle Fiber Type and Athletic Ability Human muscle fibers can be classified into two categories. Slow-twitch (red) muscle fibers und fast-twitch (white) muscle fibers. The predominance is determined by our genetics. The ACTN3 (Alpha Actinin) gene is active only in fast-twitch...

Every pound of bodyweight must be carefully monitored when you’re a record-breaking swimmer like Britain’s Adam Peaty. His approach to nutrition takes careful consideration of the fact that the 25-year-old needs muscle mass to achieve explosive power, while at the same time being acutely aware...

nd3000 / Shutterstock Everyone has to start somewhere. And the great thing about being a beginner is that strength gains typically come quickly. More strength leads to more muscle and so the adventure begins. But beginners are easily lulled into making the mistake of using beginner programs for...

Joe Stockinger has been lifting for 66 years—longer than most Muscle & Fitness readers have been alive. But even at 89, he’s showing no signs of slowing down. The German native first picked up a barbell in 1954, and to this day he puts up impressive weight. ESPN recently posted an Instagram...

Edgar Artiga You’re familiar with the standard cardio players—the treadmill (both motorized and nonmotorized); the spin, recumbent, and Airdyne bikes; and the StairMaster—but we’d like to introduce you to a lesser-known member of the roster: the SkiErg. Released by Concept2 (the same company...