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Training wrist supination.
The side lever is used to train pronation and supination of the hand. Stand with the arm against the side, elbow bent at a 90 degree angle. With the wrist neutral, hold a sledge hammer by the handle so the head is straight up in the air. To work pronation, slowly rotate the forearm until the palm faces dawn and the hammer handle is parallel to the ground, then return the hammer vertical. Supination is trained by rotating the other direction, so the palm faces up at the mid point of the exercise.
Side Lever
Watch the Video - Side Lever (WMV)
