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Oh yea, the calves and balls of the feet. If you are a seasoned runner and think you have well developed calves and the balls of your feet are tough and have never tried jumping rope before, try it for a while. […]
Oh yea, the calves and balls of the feet. If you are a seasoned runner and think you have well developed calves and the balls of your feet are tough and have never tried jumping rope before, try it for a while. […]