I do about 30 minutes of different kinds of shrugs every upper body workout. My basis is physio shrugs to hit the rhomboids and traps, but I also do at least one or two pure strength lifts. Every body here should try the basic advice in Kelso's Shrug Book: whatever lift you're doing, finish it with shrugs. On your final rep of your final set of squats, stand and shrug the bar until failure or near failure. Bench press: same thing, but shrug the bar forward. BO rows: same thing, but shrug the bar backwards with yoru arms extended (bringing your shoulder blades together). Deadlift: do some shrugs at the top. Dips/pull-ups: shrug your body upwards at the straight-arm, fully extended position. Do it with everything. Doing shrugs at the top of front, lateral and rear delt raises is a wild time that makes your shoulder girdle feel like an iron block. Doing shrugs with the bar in a front squat position was a weird-as-hell movement that immediately carried over to escaping side-mount in BJJ.