Muscles: Slow-Twitch and Fast-Twitch: Do You Know the Difference?
To be serious about body-building you need to know about the muscles that make up your body.   Muscles are composed of fibers which are cylindrical cells about 50-100 nanometers (nanometer is one billionth of a meter) twitch follower kaufen  in diameter and several centimeters long. The strength of an individual fiber increases with its diameter, the greater its diameter the stronger...
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