This Videojug video shows you how to strengthen your upper back muscles with both barbells and dumbbells but while still utilizing the same basic technique with either one.
A muscle confusion workout is key if you want to keep increasing and developing your muscles. It helps to stop you from plateauing and provides good variation while working out which can also prevent tedium.
You have to follow a healthy diet and also do some exercises on your pectoral region if you want to get rid of moobs or man boobs. But first, it needs to be assessed by a physician.