A crunch performed over a stability ball that extends the range of motion beyond a flat floor crunch, producing a deeper ab stretch and a stronger contraction.
Form tips
Sit on the ball and walk your feet forward until your lower back rests on the ball.
Lower your upper back over the ball to extend fully, then crunch all the way up.
The instability of the ball engages more core stabilisers than a flat crunch.
General fitness information, not medical advice. Check with a qualified professional before starting a new program or if you have an injury. Lyfta AI · Privacy · Terms