The corkscrew is a core-strengthening exercise that targets the lower abs, hips, and lower back. The twisting movement engages the obliques. This exercise also improves shoulder stability.
Lie on your back with your arms palms-down by your sides. Extend your legs straight above your torso, perpendicular to the floor. Cross one leg over the other.
Brace your core and move your legs in a circle. As you complete the circle, press your arms into the floor and elevate your hips to bring your legs as high over your head as you can. Lower your hips and extend your legs back to the starting position.
Press your palms against the floor throughout the exercise.
Raise your hips with your abs, not with momentum.
Your neck should remain in line with your spine at all times.