Most people in the gym are doing chest, back, biceps, triceps.
And all the time they neglect the most important muscle; the largest muscle in the body – gluteus, which needs a lot of stimulation to activate and the abdominal muscles, which are the center of everything.
This muscle group is known as the core, and I suggest that you should start exercising core regularly.
Not only you will eliminate back pain and improve your posture, but you’ll fix performance in every aspect of training.
Workout for function and appearance will come by itself.