I'm 18 and I have like no schedule at all. All my friends work different hours so we end up hanging out at night. Like this week i've stayed out till 4 am 3 times lol. And I kinda sleep whenever, i'm sure its taking a negative effect on how I build muscle...but what are the effects, and how bad is it? I'm the kind of person that takes a few hours to fall asleep...so sometimes I end up staying up for 2 days straight.