Exercise Ball Crunch

Muscles worked

Main muscles
- Diaphragm
What it is
This core exercise utilizes an exercise ball to engage your abdominal muscles. You perform a crunch while stabilizing yourself on the ball, which enables an extended range of motion. This movement effectively targets your core for improved strength and definition.
Technique tips
- Keep your lower back pressed firmly against the ball throughout the movement.
- Place your hands across your chest to help prevent any neck strain.
- Exhale as you lift your torso, then slowly inhale returning to the starting position.
- Focus on contracting your abdominal muscles to initiate the upward curl.
- Allow a slight stretch over the ball at the bottom of the movement.
How to track your progress
Log the weight and reps of each set. Straddly turns every set into an estimated one-rep max, so a heavier single and a strong set of eight both count as progress, and it flags a personal record the moment you beat your best.