Usain Bolt is quite literally the human version of a cheetah. What do they have in common? Their muscle composition.
Muscles are made of muscle fibers. Now, there are two types of muscle fibers: slow-twitch and fast-twitch. People who have a high number of slow-twitch fibers are good at activities that require endurance. A perfect example is a marathon runner. Those who have a high number of fast-twitch muscle fibers excel at activities that require a short, yet explosive burst of energy. Case in point- a sprinter. Read More