Medicine Ball on Legs Crunch
Lie on your back on the floor. Your legs should be lifted off the floor and bent at a 90 degree angle. Your arms should be extended over your head holding a medicine ball.
Flex your spine and crunch your body bringing your arms back over your head to the front and to perform a simultaneous crunch motion. At the top position put the medicine ball on your lower legs.
Return your torso back down to the starting position holding the ball onto your legs.
Crunch your body again and grab a ball with both hands.
Go back down to the starting position until the ball touch the floor again over your head. Repeat the exercise according to the training plan.