What are some good exercises to increase the size of both? How often should I train both if both of them are lagging? Also, are behind the back shrugs necessary or are front shrugs fine? And is it the wider the grip on upright rows, the more the traps are worked or more the delts are worked? Should upright rows be something done about 5-8 sets with various grips? Heavy/Light? Please let me know. Thanks.
