Hours of sleep: hacking yourself

Is it possible to sleep for only 4 hours? If yes, how have you managed?

If you live an active lifestyle no definitely not, however if you are pretty lazy in general and dont move around much, it might be possible if you go for some sort of 90 minute main "sleep" then fill in the gaps with 20 min naps however it very much depends on your body in general, some will find it easy some won't, in general though getting a lot of sleep is good, not just to feel refreshed but it also force stops you from doing something for too long and burning yourself out in it.

It's possible, but not recommended. Sometimes you can take the sacrifice to sleep less in case you need to get stuff done.

Im way to active to be even close to developing a 4 hour a night thing... i feel dead after only 6 hours of sleep

i can and i just games and go out to keep me focused and awake

Its very possible, your just gonna crash very hard the next day.

Didn't Margaret Thatcher claim to have only lived on 4 hours sleep per night?

Cause of my job and freelancer stuff. Sometimes I just have few hours of sleep, but with a lot of coffee i can make through. But the sleep quality is the main objective here, if you can sleep few hours and feel fresh, than you can keep this habbit.

Definitely possible, theres people who run off of low amounts of sleep every night
I myself only sleep 6 hours everyday and thats a perfect amount of sleep for me

I really not think it possible, your body need at least 6 hours per day. and beside that, sleep is fun!