...in terms of greater shortening of said fibers, but this does not mean more force will be exerted with these fibers, so I don't think it matters, but that's their point of view....
Yes in fact there is more shortening, so I agree that it can be comsidered emphasis. Do I think it matters? Do I think it will cause greater growth of the fibers shortened more? No...so the point is moot.
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Complex problems have simple, easy to understand, wrong answers.