Repeated exercise, or wasting, can change the way key genes work.

If your fitness goal is to up the ante on endurance, pack more power into your sprint, or supercharge your strength gains in the gym, it’s worth exploring – what are the different muscle fiber types?

Tsukuba, Japan—Different types of exercise encourage the formation of different types of muscle fibers, or the cells that make up your muscles. Slow twitch muscle fibers support endurance activities ...

Building muscle mass offers more than just aesthetic benefits—it can help you achieve more balance, improve blood sugar management and boost mental well-being. However, the ease of gaining muscle can ...