Deadlifting is a large compund movement which involves several core muscle groups working together. Core must be activated, glutes and lower back working with quads and hamstrings too. The deadlift teaches the spine to remain stable under large forces. By using a BOSU with this exercise, hip external rotators must work to prevent knee from rolling in and medial quads such as VMO have to work to maintain knee stability on an unsteady surface. A great exercise for training spinal stability, knee, hip and pelvic stability and with the BOSU, core stability too.