\"Every contraction starts as an isometric contraction.\" Explain why this state

Question

"Every contraction starts as an isometric contraction." Explain why this statement is true. Imagine that I've asked you to do some deep knee bends, squatting up and down for 30 whole minutes. You are moving your own body weight, mostly. Would that produce an isometric or isotonic contraction when you lifted it? What muscles did you use to extend your legs? What part(s) of your brain send(s) the commands to contract those muscles? This exercise would be tiring, but you'd be able to do it for longer than if I asked you to do chin-ups from a bar. Compare the fiber types found in the legs compared to the chest and arms.

Explanation / Answer

46)quadraceps muscle

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