
The bicycle crunch works the abdominals, with a torso rotation.
Lying on your back, hands behind your head, lift your shoulders off the floor and raise your legs, knees bent.
Bring one elbow toward the opposite knee while extending the other leg, then switch sides in a pedaling motion.
Do not pull on the back of your neck with your hands: the rotation comes from the torso.
Image and text: Bryl Lim / Everkinetic — recoloré et rastérisé — CC BY-SA 4.0, via Workout Guide. Original entry