I see these definitions tossed around a lot, and wanted some input on people's understandings of what these mean. note: I pulled these numbers out of the air, just as an example. Say I can't push 200 lbs... I can kinda get 180 lbs up, but not all the way, and only a couple times before I can't push it again... I can comfortable do 160 cleanly for like 8 or 9 reps, and on that last one I really have to push to finish it off. I still have energy, but I'll only get it maybe 1/4 up again before I can't move it no matter how hard I try. Now... when people talk about training to failure, are they talking about putting everything they have into that last one even tho they're not gonna lift it... just keep pushing until they're exhausted? Or are we talking about putting all you got into that last one you can complete, and not wasting your energy on that last incomplete rep, and going on to work on something else?