The Icarian chest supported row falls only behind barbell row variations for efficacy in building the upper back and deadlift muscles (hamstrings/spinal erectors). Yet the Icarian spares the low back and hips much more than barbell row variations. This makes it an invaluable tool for upper back accessory. If you are too beat up to do barbell row variations, you can still utilize this machine and build the primary deadlifting muscles.