If you didn’t already know you have different types of muscle fibers in your body, now you do. And depending on how you ...

Former NFL pro Roman Fortin is helping his clients strengthen their "Fast Twitch" muscles—the muscle fibers we use when doing short, intense—more exertive activity. Problem is these types of ...

“We all have slow and fast-twitch muscle fibres,” she says. “Fast-twitch muscle fibres are used for power and strength – high-intensity movements or exercises – and grow faster and bigger.

To understand the physiology at play, it helps to know the difference between our two types of muscle fibers: fast twitch ... To get yourself to hit the gym regularly, sport and performance ...