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Reply to "tennis balls"

handcrunchers are the best to use. I used tennis balls this summer and didnt really care for them so I started using Handcrunchers. They work great, you can find them at Dollar stores anywhere. STRAIGHT FROM MARSHALL UNIVERSITY'S HEAD COACH AT CAMP THIS SUMMER:

"To make your swing more powerful, squeeze bags of sand,handcrunches,or tennis balls. The best are handcrunches.
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