If you’ve ever wondered why some people seem to adapt more quickly to resistance training, it’s probably due to the type of skeletal muscle tissue they have. Each of our muscle fibers is either ...

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 ...

Speed training with resistance focuses on improving sequencing, not brute force. The weighted vest adds load that forces efficient movement. Fast-twitch muscles engage more aggressively. When the vest ...