Move Targets: Abdominals and lower lumbar
Step 1: Sit down on a mat with your medicine ball next to your left hip, keeping your knees bent. Slowly lean your upper body back to a 45-degree angle.
Step 2: Raise your feet up with knees bent, and cross your right foot over your left.
Step 3: Rotate your upper body to bring the medicine ball from your left hip up and across so that it is over your right shoulder. It should be above your forehead.
Step 4: Do as many reps as you can within 60 seconds. Alternate your starting side after 30 seconds.
Modification (Beginner): Keep your feet on the ground or ditch the medicine ball.