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What does lactic acid lower that prevent muscles from contracting?
Wiki User
∙ 10y ago
The increase in lactic acid concentration in the muscle fiber's site doesn't allow the calcium ions flow from the sarcoplasmic reticulum to bind with the troponin of the actin site.Therefore the tropomysin doesn't clear the way from myosin cross-bridges to bind with the troponin which leads to the further muscle contraction.So from that point the entire muscle action ceases, till the lactic acid drains itself to be converted into useful products to be used by the body.But this is only in the case of trained athletes and in case of untrained, sedentary human, the lactic acid concentration takes a leasure-long time to get removed from the site followed by long lasting DOMS (delayed onset of muscle soreness) after any exercise and the opposite action is true in case of trained athletes.
Wiki User
∙ 10y ago
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The biceps and triceps muscles work synergistically; the biceps muscles contracting concentrically and the triceps muscles contracting eccentrically when the forearm lifts, and it's the exact reverse when the forearm lowers.
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Pain and cramping
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What is the purpose of the lower arm muscles?
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What are three muscles involved in push-ups?
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List of two joint muscles in upper and lower limb?
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Is the skin of the lower arm proximal to the muscles below it?
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What is a v line?
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