The misconception that muscle can be lean or bulky lies in its appearance. “When people (say ‘lean’), they’re usually describing a look — muscle that appears more defined because there is less body fat covering it,” Cedric X. Bryant, Ph.D., chief executive officer at the American Council on Exercise, tells TODAY.com.

Getting out of a chair shouldn't be a struggle. Yet for many older adults, simple everyday movements like this become increasingly difficult as our muscles break down and weaken with age, a process called sarcopenia.

Becker muscular dystrophy (BMD) is a type of muscular dystrophy, a genetic condition that weakens and damages muscles. It can worsen with age. However, its symptoms are less severe than those of Duchenne muscular dystrophy (DMD), which is more common.

Effective shoulder training isn’t about lifting heavier weights—it’s about proper control, smart volume, and muscular balance, according to top U.S. trainers, sports scientists, and strength coaches.

Defined biceps and triceps aren’t exactly a new cultural phenomenon — Grace Jones and Madonna were flexing their muscles long before protein became a buzzword, while Cindy Crawford encouraged women to pick up dumbbells in her early-’90s workout tapes.