NBA players stay up. They finish games at about 10:30 and have to interview, shower, and transport. After all that exertion, they will probably eat a meal and won't be able to sleep right away. Plus many are out making it rain on the tip rail with all their dough and that is fact. I really think this is what the Warriors problem is. Staying up too late. In order to play with the upmost intensity, you are going to need ample rest and sleep. That's just how it is.
Up until these last few months, where my body is suddenly incapable of doing anything, I loved living off of 5-6 hours to sleep for anything. We always had practice at 9AM on Saturdays, and I was the Captain. So I'd wake up like 6-6:30, I'd eat, I'd stretch, I'd walk my Dog, watch a little TV, I'd shit, I'd shower. And I'm calling the guys I'm picking up. Never had a problem.
I got home at like 6 and went to bed at 7:20...I slept thru 4 alarms and woke up 25minutes ago.