Nope!
Have you ever run on less than five hours' sleep each night for a week or more?
2 hours each night for two weeks, on limited food rations and some of the most hellacious patrolling I've ever done.
No I haven't.
Have you ever stood in one place for so long that a spider started to make a web on you? No joke that really happened. I let it for about five minutes but then I got bored.
I don't usually sit that still, on the same training op described above though. Yes.