Question

Difference between isometric contraction and isotonic contraction

Answer 1

Answer:

While isotonic and isometric contractions form essential parts of the muscular contraction system, there are however major differences between them. In an isotonic contraction, the muscles maintain the same tension as it shortens while in an isometric contraction, the muscle remains the same length as the tension changes . Isotonic contractions are known to have shorter contraction and relaxation times while isometric contractions have longer contraction and relaxation times. Changes in temperature affect each kind of contraction differently. While an increase in temperature increases the time taken for shortening of muscles during an isotonic contraction, it however decreases the time taken for an isometric contraction [3]. Isotonic contractions release a great deal of heat during muscle contraction making this less energy efficient while isometric contractions release less heat, making this a more energy efficient form of contraction. In addition, isotonic contractions occur in the middle of a contraction while isometric contractions occur at the beginning and end.

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Answer 2

Answer:

In an isotonic contraction, the muscle maintains the same tension as it shortens, however, in an isometric contraction, the muscle remains the same length as the tension changes.