it was very well explained is some book i had...probably "one move too many".bend your wrist backwards : your fingers tend to bend a little, isn't it?That's because when you extend your wrist, you lenghten the path of your finger flexor's tendons. To balance this action and keep the same lenght, the tendons shorten their path at the fingers, bending them.that is the reason why, when pumped, you raise your elbows : in a desperate attempt to extend your wrist as much as possible and help your finger flexors.btw you normally do this by using your wrist extesors (ie you do it without even knowing every time you crimp), but when you're dead pumped either they are pumped as well as the flexors, or they are not effective enough
That's because when you extend your wrist, you lenghten the path of your finger flexor's tendons. To balance this action and keep the same lenght, the tendons shorten their path at the fingers, bending them.that is the reason why, when pumped, you raise your elbows : in a desperate attempt to extend your wrist as much as possible and help your finger flexors.btw you normally do this by using your wrist extesors (ie you do it without even knowing every time you crimp), but when you're dead pumped either they are pumped as well as the flexors, or they are not effective enough
(Is that OK Simon?)
I think it might be related to muscles being stronger in their mid-range than when closer to fully shortened....