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Physics, 24.01.2020 00:31 Halieyrobinson3003
At its natural resting length, a muscle is close to its optimallength for producing force. as the muscle contracts, the maximumforce it can deliver decreases. when a muscle is at approximately80\% of its natural length, it cannotcontract much more and the force it can produce drops drastically. for a muscle stretched beyond its natural length, the same is true. at about 120\% of its natural length, the forcethat a muscle can exert again drops drastically.
this muscle length to force relationship can be demonstrated bydoing a chin-up. as you hang from the bar, your biceps muscles arestretched and can produce only a relatively small force. as you getclose to the bar, your biceps muscles contract substantially, andyou again experience difficulty. the easiest part of the chin-upoccurs somewhere in between, when your muscles are close to theirnatural length.
imagine hanging from a chin-up bar and beginning a chin-up. which of the following velocity versus time graphs best representsthe first part of your motion (from being at rest to beingapproximately halfway to the bar)? assume you are trying to do thechin-up as quickly as possible.
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At its natural resting length, a muscle is close to its optimallength for producing force. as the mu...
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