round your back
Heavy steel on straight legs is a basic exercise in bodybuilding and fitness. Like other variations of dead weight, this exercise involves, to one degree or another, practically all the muscles of the human body, but the main load falls on the muscles of the spinal straighteners, the biceps of the thigh and the buttocks.
Deadlift on straight legs increases the mass of the legs and buttocks, tightens the buttocks, and also strengthens the lower back and muscles surrounding the spine. Continue reading