In the Zen/Buddhism world its called samadhi
. If you've even been doing something so intently that you forget the outside world, that is a form of samadhi. I guaruntee if you lift weights like that, you will lift a ton of weight.
I'm that way with many things, I am doing them so intently that it literally takes my wife coming up beside me and hitting me to break my concentration. It is a very, very interesting state of mind. One day I hope to obtain absolute samadhi, and maybe even what is termed kensho
So if you haven't guessed it yet, every day I spend at least 15 minutes meditating using the bamboo method of Zen meditation.