If you didn’t already know you have different types of muscle fibers in your body, now you do. And depending on how you exercise or what sports you enjoy, you’re building and recruiting some ...

Subscribe today. 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 ...

Muscle fibers in children with SMA type 1 show substantial differences in components of the myosin protein called heavy ...