while sitting at work i had an idea. i dunno if i'm gonna be able to explain this properly but i'm gonna give it a shot. say you want to curl a lot of weight. normally you would train your arm through different methods and do whatever amount of reps you saw fit. what i was thinking is this: moving an x lbs. dumbbell is easier as it's moving. so, if you are going to curl a 20 lb dumbbell, the hardest point would be the first couple of inches, and after that you're keeping the motion going. i was actually thinking in my mind of trying to push something heavy on ice; it's hard to get it moving initially, but takes less force to keep moving as you go along and it's already at a set speed. so, if you're training your arm by doing a full motion rep, you're training all the arm equally, when it's the part of the muscle most responsible for getting the weight going that should be targeted more. so, if you wanted to increase the weight you could curl, wouldn't your training efforts be better spent just using a heavier weight than you can curl and focusing on that beginning part of the movement?