Lie down on a workout bench with your head near the edge. Grab the sides or the back of the bench just above your head for stability. Bend your knees toward your chest, tucking them tightly. Engage your core and glutes, pressing your lower back into the bench.

With your core fully engaged, slowly lift your hips off the bench, driving your knees upward while keeping your back straight.

Lower your hips back to the bench, maintaining control and tension in your core. Resist the urge to let your lower back arch or collapse.