
The reverse crunch works the abdominals by curling the pelvis toward the chest.
Lying on your back, arms by your sides, lift your legs with knees bent at 90°.
Curl your pelvis to lift your glutes off the floor and bring your knees toward your chest, then lower slowly.
The movement comes from the pelvis: do not swing your legs.
Image and text: Bryl Lim / Everkinetic — recoloré et rastérisé — CC BY-SA 4.0, via Workout Guide. Original entry