I'm come to a sticking point in my 5x5 program. I'm 3 weeks in and I'm not sure what to do for chest anymore. Due to shoulder problems I can't bench anymore. I can only use dumbbells comfortably. Problem is the dumbbells only go up to 120lbs. in my gym which I can do comfortably for 5 sets of 5 reps with good, slow form. Should I pre-fatigue, switch to another exercise, or increase the reps/sets. I can't press anything with a barbell. I use dumbbells for flat, incline, and overhead press.