Yeah, it does.
I average about 4 hours of sleep a night, even after days of long physical labor.
I came home yesterday after a 14 hour shift, so tired my feet are dragging the floor. Showered, went straight to bed. Soon as i hit the bed, i couldnt sleep. Fell asleep at midnite, woke at 345. Laid in the dark with my eyes open for 2 more hours before just getting out of bed.
It makes for really long, shitty days.
It really fucking sucks.