I have been doing it for a number of years now. My limit is what I can do while maintaining great deep sleep, etc. I can occasionally push harder, but then slee

I have been doing it for a number of years now. My limit is what I can do while maintaining great deep sleep, etc. I can occasionally push harder, but then sleep and overtraining creeps in. So, I am staying somewhere comfortably under that overtraining threshold. Even minimal alcohol consumption starts really messing things up :)