Here, Strickland wants you to feel the stretch throughout your lower body, hips, and core.
Place your right knee on the ground and your left leg extended out front while maintaining a 90-degree bend at your knee with your left foot on the ground facing forward.
Make sure your front knee is not going out in front of your toe.
Push your hips forward, so that your back leg feels a stretch in the quadriceps.
Once you are in this position, place your left hand by the left hip as your right arm reaches over your head.
Be sure to keep your chest upright and don't lean forward.