The core is your trunk. It is from the lower chest to the hips. It includes the abs, obliques and lower back.
Balance Discs

Stand on balance discs with your feet shoulder width apart. Shift your weight from side to side while maintaining balance.
BOSU Balance
Stand on a BOSU with the ball side up. Shift your weight from side to side.
"BEFORE BEGINNING ANY EXERCISE PROGRAM,
PLEASE CONSULT YOUR PHYSICAN"
NOTE:
Exercise is a physical activity that has a potential physical risk. Peter, his staff and all of his affiliates are not responsible for any injury that could occur from exercise.
