You successfully split the vertical fork, because the medial thigh ligament is not completely opened, and your waist is not straight. When you want to straighten your waist when you successfully split the vertical fork, you will further stretch the ligaments measured on both sides of your thigh. Because the medial thigh ligament was not completely opened, you successfully split the vertical fork, and your waist was not straight. You successfully split the vertical fork, because the medial thigh ligament is not completely opened, and your waist is not straight. Vertical leg splitting means that the legs are separated back and forth in the shape of 1, and both hands support the ground. Vertical leg splitting is a kind of leg splitting that makes the upper body stand upright and then tries to make the body vibrate downwards until the legs are separated into a line before and after sitting underground.