The pull-up is the sixth Strength Performance Level exercise. It involves excellent upper body strength and torso stability. Many people lack the strength to even perform one pull-up. Therefore, lifting 100% of your body-weight is the benchmark to achieve a level three pull-up.
The inverted row is used for levels one and two. The inverted row is similar to the pull-up, however you use a lower bar, keep your feet on the ground, and while keeping your body straight you row yourself up to the bar. A level one pull-up is an inverted row with the body at a 45 degree angle. A level two pull-up is an inverted row with the body at a 15 degree angle with the floor.
Julie performs a set of body-weight pull-ups with good technique.