Is it bad to run when you only sleep for 5 or 6 hours?

On an average week day during school I usually go to bed around 2 o'clock and wake up around 6:30 yet I'm not tired at all. O...

I get two hours of sleep a night is that bad? I haven't been able to get regular sleep for a couple of years because of some...

Okay so because of Christmas vacation I have screwed up my sleeping schedule badly... like I mean I have been going to bed at...

Well I usually have a hard time sleeping lately, I just love the night lol and I like staying up late, but whats the least am...

I'm am 13 and I stay up late a lot. I have heard that the average human needs at least 8 hours of sleep, but I only get like ...

For about 4 or 5 months now, I have been constantly getting up at about 2 or 3 o clock in the morning, forcing myself to go b...

This probably a stupid question, but.. I'm sick, and I went to bed at like 1:00 AM the previous night, when I WASN'T sick. Bu...

for these past few days, I have been only sleeping for 4 hours each night. tho I try to fall back to sleep, I just end up lyi...

when I lay down my body seems like it dont wont to relax and my mucles hurt

According to my roommate I got up in the middle of the night and started running around the backyard. I wasnt drunk im str8 ...