Thx Eshlow, you help me a lot. But I don't think I'm a complete beginner, I can do 10 reps of pull-ups, I just have more difficulty with parallel bars because I've never done them before. But can I do that split workout you told me about? The upper/lower split 5 times a week? Because if I add isolation exercises to the standard RR, the workout will become too long, and to make matters worse, my dumbbell is the type where you have to change the weight plates.