Start by sitting on a Swiss ball with your feet flat on the floor. Lean back while walking your feet out until your shoulders, upper back, and lower back touch the ball. Place fingertips behind ears. Engage core and keep chin up as you lift shoulders and upper back off ball in a crunch. Perform 15 reps.25 Eyl 2021
What is a crunch on a Swiss ball?
Start by sitting on a Swiss ball with your feet flat on the floor. Lean back while walking your feet out until your shoulders, upper back, and lower back touch the ball. Place fingertips behind ears. Engage core and keep chin up as you lift shoulders and upper back off ball in a crunch. Perform 15 reps.25 Eyl 2021