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3 core and stability exercises you're probably not doing, but should be
The slam ball is just what it sounds like — a ball-shaped weight you can forcefully throw overhead or to the side against the floor or wall, which taps into your whole body to generate explosive ...
Tennis12y
Stephens: Simon slammed ball in my chest
"He hit with a ball when I was ball kid for the first time. He hit me right in my chest because he lost a point and set he turned around and slammed the ball and it hit me," Stephens told a ...