So my "trainer" (friend who thinks he knows everything) tells me if I want size (semi hypertrophy while still gaining strength) my last set should be a burn out set. That's apparently when I do my last set til exhaustion, then immediately lower the weight, and do that til exhaustion, until I'm on a ridiculously light weight and my muscles completely give out. Is this recommended? Or would it end up in overtraining? I did this tonight for triceps and I admit it felt great and my tri's feel very worked, but I don't want to overdo it. Good idea? Bad idea?