kemii ball

 sole, knees bent, while the upper body to try to maintain a vertical position, chest slightly forward but do not bend. At the same time, it should ensure forefoot support, that is your tretorn balls approach: not sideways, wrist and Grip unpaired 90 degrees, right arm belly did not stick, the handle is not attached to the waist. Consequences: since the left torso muscles developed no right side, left side muscle coordination, strength, catch up on the right side, while the backhand is on the left just muscle force, and if the position is not correct, is likely to cause  [Details]