I noticed something lately about experienced lifters in the gym I go to, they tend to use a lot of weight, but use a very limited range of motion.
For instance, I saw a massive guy (6'4, 275 maybe) using 100 lb DB while doing incline presses, but was barely moving them up and down 6 inches. I've seen other guys doing flat bench and stopping 6-8 inches short of the their chest before going back up again.
Do you think they are doing this because of pain/injury when using the full range of motion? Or is it to look stronger than they really are?