1) Everyone has heard the popular slogan “no pain, no gain!” Well, I am not a believer in that phrase if someone is experiencing physical pain, and I’m not talking about stopping a set just because your muscles are burning. If a certain movement or exercise causes physical pain, stop!
Physical pain is not necessary for success, and in fact is very counterproductive. However, there are times when the phrase “no strain, no gain” can be applied. For instance, if you are trying to increase your strength, then there are going to be times when you’re going to have to strain to push (or pull) a heavy weight.
Another phrase I prefer: “no brain, no gain”. Don’t just train hard, but please, train smart. Doing stupid stuff in the gym will just get you injured.