Nope. I need 8 hours sleep,
minimum, to be productive. Otherwise its hello headaches, itching eyes, general lethargy, grumpiness, poor memory, et cetera.
I think my training is starting to take its toll. Back when I was in my twenties I could work out pretty hard and not need more sleep than usual.
But nowadays (having picked up my training again last year as a result of a 30-year crisis) I need two to three hours extra sleep after a training day to feel rested.
If I have to get by on 6 hours, which was pretty much standard back in my college years and early career, I'm a wreck.
I function a lot worse even when only a bit tired. It's almost scary how much and how quickly being hungry and/or tired affects everything.
I know, right? I've taken to napping in the afternoon, before getting on with my work or whatever needs doing. Getting anything done is a drag when you're starting to tire, so you might as well invest an hour or two on sleeping - you will end up getting the same amount of work done since you're more efficient when rested, and you'll do it without feeling like shit while doing it.