My friend recently fell and injured his back and front section in construction. He has been serious about bodybuilding for 4 years and wanted me to ask you guys what he should do. The doctor told him he cannot do any pushing or pulling movements for 2-4 months. He is still going to do some leg work and wanted to know if it is a waste of time to work arms only. He is the type that feels that your arms are only as big as you bench and pulling movements are. He does have 17 inch arms and usually works his arms after back and chest. Shold he have a workout dedicated to arms?