The crossed-legs leg lift is a core-strengthening exercise that targets the lower abs, hips, and lower back. This exercise also improves shoulder stability.
Lie on your back with your arms at your sides. Extend both legs overhead so they are perpendicular to the floor. Cross one leg over the other.
Tighten your torso and lower your legs until they make a 45-degree angle with the floor. Exhale and bring your legs back toward your body. Then lift them so your feet are directly above your head. Pause, then return to the starting position.
Press your palms forcefully into the floor to engage your abs and help with stability.