secondary bodyparts with p/rr/s routine?

[mcveigh1]

when in the power portion of a power, rep range, shock routine wouldn't you be more likely to injure secondary body parts? i mean if your going for 4 reps and just barely making them wouldn't that put a lot of strain on your smaller muscles like bi & tris... i'd rather be able to work out consistently then get injured doing curls w/ 65x4... just wondering as i was considering a p/rr/s cycle to switch things up