![]() ![]() The concentric portion involves shortening your muscle fibers, the eccentric is the controlled lengthening of the tissue, and an isometric contraction is a static, non-moving engagement of the muscle itself. Knowing the design and functionality of a machine as complex as the human body can help you use it optimally in the gym.īelieve it or not, there’s more than one type of muscular contraction. If you want to make progress in the gym, you need to have at least a cursory understanding of how your body functions.
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