What are those “fast twitch” and “slow twitch” muscle fibers you hear about? Here’s a simple explanation!
Fast Twitch, Slow Twitch
When you are into bodybuilding, running or fitness in general, you have heard the terms: “fast twitch” and “slow twitch” muscle fibers.
But what are they actually?
Here’s what they do, if slow or fast twitch fibers make you bigger and what type bodybuilders, marathon runners and sprinters benefit from. We’ll also check if you can influence how much of each type you have and if it’s really necessary: