Prop up on one elbow on your side next to a bench or elevated surface, and place your top leg on the bench with your foot or ankle supported. Your bottom leg should be beneath the bench, either hanging bent back at the knee, or lightly touching the ground. Support yourself on your forearm (elbow under shoulder), lift your hips off the ground, and engage your core to maintain a straight line from shoulders to feet. Hold this position, keeping your body stable and avoiding sagging or twisting.