Thanks for good info. and links you gave and the explanation of all the terms I stated.

But reading all this again leaves me to think that bodyewight exercises do tend to have a magical advantage over weight training.[esp. the rock climber article seems to prove it.]

However I still can't figure out why if a person is using weights heavy enough {enough to manage just a rep or two} why should not those be exactly similiar to bodyweight exercies {of course if no chaeting is allowed}.

Secondly in pullups I think so the the closed chain will not apply since one is actually moving the body [overcoming the resistance of the body's weight].

Also somebody told me that the type I fibers decline faster than type 2 fibers because of what they call the body ability to do and maintain just what is required, and so maybe during detraining the body feels that type 1fibers [which are used first in regular activities] are not required in so great a volume and hence t cut down on them, but the type 2 fibers{so long as proper nutrition is supplied} are preserved as fight or flight adaptations. Is this true.

And this is for BG5150, I know I should have written exciting fact or myth, that would have sounded better,the rest of the sentenceyou typed was not understanable. .