Yes absolutely those can account for injury. But the thread I answered was dealing with specific exercises. Olympic lift's cons outway the pros. There are alot more exercises that you can do that will not put as much stress on your back, knees, and joints as olympic lifting does. There was this whole theory of more weight more explosion. But that is a whole other topic. Im sure we have alot of the same philosophies, but like I said there is no perfect workout, just one that works for you and you believe in. But I do believe there is some workouts that are more beneficial.