la vengeance
Blue Belt
- Joined
- Jun 3, 2006
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Hey guys, I was looking into various things to improve grip/forearm strength for jiu-jitsu.
Anyone heard of the Dynaflex Powerball device? It was designed for grip, hand strengthening, etc.
Has anyone used this to improve their grip for jiu-jitsu purposes?
Thanks guys.
Anyone heard of the Dynaflex Powerball device? It was designed for grip, hand strengthening, etc.
Has anyone used this to improve their grip for jiu-jitsu purposes?
Thanks guys.