the difference between static training and repitition

[master splinter]

in my opinion and from my experience, i feel that one can benefit more from static exercise than repitition.

my question is, why?

during repitition you get a small amount of rest between each rep, while static exercises you get no rest but constant work. are there different muscles being worked? ive heard once before about slow and fast muscle contraction and i figure that this has something to do with it, also i think that static exercises build static electricity in the muscles...

[LeiYunFat]

I think both are invaluable in training. You can't get the same kicking power just holding your leg up. You have to repetitively kick to get it down. At the same time, a guy can whirl his leg around with little or no effort while having the technique down, but if you ask him to hold it, it would almost kill him. So training needs to be varied. Cross training, is it called?