Back Muscle :
Back consist of three muscles - the trapezius muscle for upper back, latissimus dorsi muscle for mid-back, and the erector spinae muscle for lower back . spinal erectors starts from base of your pelvis to almost full length of your spine and are most easily visible from the middle to lower back.
if one had ever went around your gym and asked people if they were satisfied with their back workouts and back pumps you would get many people answering, no . why ?