How to do it
Exhale through pursed lips as you curl your hips up off the floor.
- 1
Lie on your back with your hands placed behind your head or flat on the floor beside you.
- 2
Lift your legs so your thighs are perpendicular to the floor and your knees are bent at a 90-degree angle.
- 3
Contract your abs to bring your knees towards your chest, lifting your hips off the floor.
- 4
Slowly lower your legs back to the starting position without letting your feet touch the floor.
- 5
Repeat for the desired number of repetitions.
Expert tip
Control the movement both on the way up and down to keep constant tension on the abs and avoid using momentum.
Common mistakes
- ✕Arching the lower back off the floor
- ✕Straightening the knees during the crunch
- ✕Pulling on the head with the hands