[Crunches, turn around and lie flat] mainly exercises the abdominal muscles. Hold your head with your left hand, place your right arm on the right side of your body, bend your left leg at the knee, and put your right leg on your left leg. Crunch your abdomen and turn to the right at the same time, bring your left elbow as close to your right knee as possible, hold for about 2 seconds and then return to the starting position. Repeat and then switch to the other side. Do it every other day, 4 sets on each side, 20 times per set.
