hey guys, i have been havin a lil problem in the weight room here lately...i switched my routine up a lil bit and one thing i switched was my tricep routine which i switched to doing kickbacks with dumbells, and ever since i switched it all up i have been having major problems with both of my rotator cuffs both sides hurt so bad i cant haldly do my lifts...was just wonderin if this is common and is just part of switching to this type of lift or if there is a way i could build up the muscle around there so its not so painful? maybe im doing something wrong too im not sure.