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Re: Muscle work



it does (feel pleasure) , as in head feels better when one stops hitting it w/
a hammer.

bc

William Beaty wrote:

On Mon, 23 Jul 2001, Tucker Hiatt wrote:

upstroke of a constant-speed pull-up, the average muscle force
applied is roughly the student's weight. On the constant speed
downstroke, however, the average muscle force is ...??? Mustn't it
also be the student's weight? And therefore the (magnitude of the)
work done is the same?

When you pump water up a hill, you perform work upon the water, but when
you let the water pour back down again so it operates the pump as a
turbine, is the pump again performing work upon the water? No, the water
is performing the work!

When you lift your body upwards, your muscles perform work upon your body
and gravitational potential energy is stored. But when you lower yourself
again, YOUR BODY performs the work, and your muscles do not.

The question is not why it feels worse to lift yourself than to lower
yourself. The real question is: why you don't your muscles feel pleasure
when lowering your body after a chinup, where this pleasure exactly equals
the pain you feel when raising your body?

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