The World's Greatest Stretch is a staple mobility movement that can be enhanced by adding a resistance band. To perform the banded variation, set the band around knee height and pull it high into your hip flexor. Angle your body so the band pulls your front leg outward. Once in the lunge position, drive your elbow down, and then rotate your torso up, following your hand with your eyes. The band creates tension that you must fight, which helps to open up a tight area in the body while you maintain stability, driving the knee outwards and preventing it from caving in.