Over-training is term used in weight lifting for those who are looking to build muscle mass by overloading their muscles during their working, forcing it to go

Over-training is term used in weight lifting for those who are looking to build muscle mass by overloading their muscles during their working, forcing it to go into a greater "repair mode" than from your average person lifting regimen. Another term would be 'lifting to failure', which obviously doesn't sound as good/simple as overtraining. It's understandable you're not within his target demographic and can't relate to the idea, but your comment is rude regardless.