uhmmm, no. Maybe I should qualify myself,,was a sports Therapist for 25 years with Junior A,Senior A Lacrosse,Junior Hockey and did some spot work for the Argo's in college as well as the Head Trainer for Canada's Field Lacrosse team. I have worked with Joey Newendyke Gary Roberts, Adam Foot,John Mclean, and many more NHL players when they were in Junior.
Not sure I get this muscle sack you point out. Would you mean the compartment the muscle is in?
My confusion stems from the fact that ,,okay,,like a bike,, no air in no exhaust out. So the muscle needs blood which has fuel,oxygen and carries the waste bi products of muscle exhertion,lactic acid away.
Forearm pump is basicaly from lack of physical conditioning,,,or reaching the end of your conditioning. There is no way any form of elastic will fix your forearm. The muscle is retricted from expelling blood from the death grip you mention. The only thing that can fix that is relaxing the grip and conditioning.
Lactic acid is only in the blood vessels of the muscle, it is a bi product of muscle exhertion. So the capilliaries near the surface would not have lactic acid.
Muscle stiffness is a result of lactic acid build up. Post sports stretching and cool down is primarily the way to get rid of lactic acid.
I just have trouble ,,other then the fact that ,,okay, it may feel great. Holds your body tight and gives you a secure feeling.
All of these garmets regardless,UA,PUG,VnM are all some form of enginered fabric.That in itself is really cool! But I can"t see how compression works. But, if it does not work medically,,but makes you feel better then it does not really matter, casue feeling good is what it's all about.