1. Lie flat on your stomach on a comfortable surface with your legs straight out behind you and your arms by your sides or positioned under your chin/chest.
2. Flex your feet, engaging your calves and hamstrings.
3. Slowly bend your knees to bring your heels toward your buttocks. Be sure to keep your hips pressed firmly into the ground to prevent any unnecessary movement in your lower back.
4. Squeeze your glutes as your heels come as close to your buttocks as possible without causing discomfort.
5. Hold the contraction for a second before slowly extending your legs back to the starting position.
6. Perform the desired number of repetitions and sets, maintaining a steady pace and good form throughout the exercise.