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Isotonic vs. Isometric Contractions

Isotonic vs. Isometric Contractions
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Description: Muscle Tone

Even when at rest, a skeletal muscle exhibits a small amount of tension, called tone
Due to weak, involuntary contraction of motor units

Isotonic – tension is constant while muscle length changes
Concentric
Eccentric
Isometric – muscle contracts but does not change length


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Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=40460
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