Yestrday one of my friends bought a Powerball and he really enjoy it. Today he gave it to me to try it out whether I like it or no. I love it ! Now I am ready to buy my own Powerball. I would like to build strenght in my forearms, wrist and fingers because I am doing MMA and strong arms is a huge bonus. As far as I anderstand for strenght building I need heavier Powerball, is it right ? If so which one would you recommend me from these 2 powerballs -
NSD Powerball 350Hz
RPM Sports NSD Powerball 350Hz Metal ?
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