Powerball Trainer
Does anyone have Grip Trainer - Powerball Neon Pro?
if you do you will reconmmend it for people with RSI? I play hockey three times a week, and I use my laptop for at least 4 hours a day, is this built my wrist to be very weak, I saw this advertised on amazon and wondered if it was any good .... any advice would be great .... http:/ / www.amazon.co.uk/Grip-Trainer-Powerball-Neon-Pro/dp/B000OT8J9G/ref=pd_sim_ce_title_2 - Link
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