I've been weight-training for about 6yrs now and being 'fairly' slim (approx 8%bf) I've always had an easy time with pull-ups, and believe in working back, shoulders etc. just as hard as chest & bi's . . .
My question is -- for back -- for bodybuilders if you do pull-ups do you just stick with your own body weight and do more reps? or do you do them weighted? -- I'm asking because I'm able to add quite a few plates on -- I'll do some empty to warm up, but then add 10lbs on my waist belt, then say 25, 45, etc. up to 70lbs for 2 reps and then sometimes if I'm up for it 90lbs for a single or two reps if the wife wants to help lift (lol) usually 5 sets total. I NEVER see other big guys doing weighted pull-ups . . . in fact allot just do pull-downs . . . am I missing something here ? ?