This exercise is suitable for the strengthening and forming of the hamstring and the glutes. This is the best method to score athletic and strong legs.
Face the G-Flex then grab the ends with both hands. One leg on the ground then extend your other leg parallel with the ground. Squat as if you would like to sit down onto a small chair. In the lowest position the foot of the straight leg bent backwards and your thigh touches your calf. Now stand up to the starting position and lift your knee. Repeat this with both legs. During the exercise pay attention that the feet, knees, hip and chest should always face the same direction.