Primary Muscle Group: Abdominal Obliques
Muscle Groups Worked in This Exercise: Obliques and Lower Back
Preparation: Stand straight up with back and head, holding a medicine ball extended straight out from your core front region. Make sure that your elbows are slightly bent and you keep your head and back straight during the entire exercise movement.
Breathing: Breath out on the contraction of the muscle and breath back in on the way back to the start position.
Execution: Begin by rotating to one side and then directly to the other. Do not stop in the center. Make sure that you rotate at the trunk, keeping the ball in front of the chest at all times. Rotate slow and continuously. If at any time the lower back begins to hurt, stop and readjust the position, keeping your chest out.