STARTING POSITION:
Select the appropriate weight of the medicine ball. Lie flat on your back and raise your feet so your hips and knees are around 90º. Grab the medicine ball with both hands and place it behind you on the floor. Contract your pelvic floor and core.
MOVEMENT:
Use your abdominal muscles to roll your shoulder blades off the floor and place the ball on your shins while you exhale. Return to the starting position in a smooth movement.
TIPS: Focus on slow and controlled movement Don't separate your low back from the floor when you do the exercise.