Physiological studies confirm that extensive endurance training will create an adaptation by the body, in that the intermediate fast-twitch fibers IIa may be converted to slow-twitch fibers over time. Drive your heels into the ground and pull the weight upward, standing up.
Lexell J. Box jumps are a great way to work on explosive, fast-twitch ability and shift those hybrid fibers into fast-twitch territory. People have two general types of skeletal muscle fibers: slow-twitch type I and fast-twitch type II.
On the other hand, aerobic exercises, those that mainly use slow-twitch fibers, can increase stamina and the oxygen capacity of your muscles, allowing the body to burn energy for longer periods of time.
People have two general types of skeletal muscle fibers: slow-twitch type I and fast-twitch type II.
Fast-twitch fibers are activated by their neurons at a rate ten times faster than the rate of activation for slow-twitch fibers.