isometric contraction
physiology
Quick Summary
Isometric contraction occurs when muscles strain against an unmoving resistance, meaning the muscles are stressed but do not change length. This is distinct from isotonic contraction, where muscles shorten or lengthen against a movable resistance. In an isometric condition, the load on the muscle is equal to the maximum force it can generate, resulting in no movement. This type of contraction is crucial for maintaining posture and holding positions, such as the midpoint of a push-up.12
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