Lie supine on your back and hold a kettlebell or dumbbell in your right hand, extending your arm straight up toward the ceiling. Keep your left arm relaxed at your side.

Raise your legs straight up in the air and slowly lower your legs to the left side, allowing your legs to move towards the floor while keeping your shoulders pressed down. Ensure that your right arm remains vertical, holding the kettlebell steady above you.

Use your core muscles to bring your legs back to the center, and repeat for the desired number of repetitions. Then switch sides.