of the spine is of utmost importance. Good-morning The good-morning is a weight training exercise in which a barbell, two dumbbells, or no weight at all is held on the shoulders, behind the head. The person bends forward and bows at the hips and recovers to upright. The good-morning is so called because the movement resembles bowing to greet someone. It involves the hamstrings but is primarily used to strengthen the lower back; the degree of knee bend used will change the focus – nearly straight-legged involving the hamstrings most. Wrong technique and forward lean posture with a flexed spine can leed to discal injuries of the lower back. Correct technical performance with a slightly hollow or extended back to keep the normal curvature of the spine is of utmost importance. References External links ExRx.net – list of exercises by muscle group