Cliffhanger is a workout that lives up to its name. Provided you have a chin-up bar or some means to hold from and you get the chance to practice grip strength, work on upper body tendons and fascia and strengthen your abs and diaphragm muscles. The squat-hold exercise then takes care of all your major lower body muscles. Try to maintain a 90 degree angle at your knees, as you hold it. Add EC and you get that extra load on the lower body muscles helping them adapt faster and get stronger.