One's limit is defined at that which one cannot go beyond. Hence it's impossible to exceed one's limits. I'm more about checking to see where those limits are than trying not to uh, exceed them. Limits are always a moving target, changing with fitness and age, plus there are many limits to check on, so that can occupy a good deal of time and energy and in the process, generate a lot of fun. The problem is, as Caloso says, that I can't seem to actually find them, which is undoubtedly a good thing.