Sleep deprivation alters perception and mood drastically. Sleep is so much more important than people even know
A lot, sleep deprivation can send me into a manic state, one day without much sleep is ok, 2 days in a row I begin to break down (or up), as I get older I just can't afford this state anymore, my sleep is doctor prescribed, sometimes I get 10 - 12 hours of sleep per day, which is ideal being bipolar.
Gone three days or 72h without sleep as a max.
Regularly pulled 100h weeks as a lowly intern and close to that while analyst. No idea how it affected me, didn't feel much different, coffee, amphetamine and cocaine usually counter these effects.
Without food, maybe a day? Don't really see the point of doing that though...
How much does not eating or sleeping properly affect your mood?How much of it do you need to lack for it to have a negative effect?
For how long have you gone with out sleep/food? Have you been without it in a controlled environment? For what purpose? For what other reasons have you gone with out it?
I need a lot of food and being hungry makes me moody and angry. Come to think about it, wanting to go out and kill smth when hungry is a very natural drive.
Same with sleep but not as bad. Being tired from lack of sleep is different from being tired from physical exhaustion, which is a feeling I enjoy. Not eating and not sleeping come with a shitty feeling of weak and performance is affected.
I've always listened to my body and its basic needs. It's been programmed for millions of years to know what's good for it, so when it doesn't get what it wants it becomes a priority to change that. If that's not possible because of circumstances I'll suck it up, but it better not be your fault things are this way :D
Sleep:
"How much does not eating or sleeping properly affect your mood?"
Not sleeping overtime makes me a bit more scatterbrained, and the walls between different kinds of information begin to bleed into each other somewhat. That used to pretty much be me all the time, which lead to me having to work a lot on focusing to compensate for it.
"How much of it do you need to lack for it to have a negative effect?"
Sleep is important, but it seems to take me progressively longer to get tired enough to rest. The rest itself is typically far below good quality, so eventually I become somewhat of a zombie until I hit the inevitable crash point (record rest from one of those was a solid 21 hours of sleep). After one of those I'm fatigued for about a day and then the poor sleep patterns resume, starting off on the hyper side as I progressively become more exhausted and scattered, rest or not. Some days I'll even wake up more tired than I felt when I went to sleep, and consistently feel that way instead of push past it.
"For how long have you gone with out sleep/food?"
That depends if 1 to 5 minutes of blacking out before having a nervous twitch wake me out of it every so often counts as sleeping. If it doesn't count, then I've gone a little over a week. If that does count as sleeping, then somewhere around four to five days is the average that decreases overtime from progressive exhaustion to two to three days.
"Have you been without it in a controlled environment?"
For sleep it was everywhere. Whee insomnia.
"For what purpose?"
Sleep issues aren't a choice for me, and it seems to be getting progressively worse.
Eating:
"How much does not eating or sleeping properly affect your mood?"
Not eating makes me lethargic and weak, facing body curling aches in my stomach until the sensations numb and I feel generally ill instead. After a while I just feel really really tired while possessing no desire to eat anymore beyond hunger pains every so often that felt like a punch in the stomach.
"How much of it do you need to lack for it to have a negative effect?"
I can fast fairly well, but it's horribly unhealthy for me to do. The time I didn't eat for a week had me lose a surprising amount of weight (35 pounds).
"For how long have you gone with out sleep/food?"
For food, I think it was a week. I wrote down how long it was more specifically somewhere... but it was around a week. It doesn't even feel like it really happened.
"Have you been without it in a controlled environment?"
For food, yes.
"For what purpose?"
Choosing to not eat began as a willpower exercise that had me rewarded with food tasting better than otherwise, but that was never for longer than a day at most. At one point however I went through some weird unstable thoughts related to wanting to test myself, both for how long I could go without food and to ask myself if I wanted to live anymore or not, taking a slow and painful way out to see if I was really serious while keeping food and drink close enough to consume if/when I'd given up. Starvation's a surprisingly strong motivator once your willpower's sapped and you know your means of fixing it are within your grasp.
Oh my, now I want to lock you up and starve you and not let you get any sleep! For days and days… Oh, the things i'd make you do for a warm meal and a few minutes of rest…the mere thought of it excites me! You would kneel and reluctantly kiss and lick my feet and even ask nicely for a piece of the juicy stake I'd be waving in front of your hungry, tired eyes… You would lick my clit and pleasure me to be allowed an hour of blessed sleep from which you'd be awakened by the sharp sting of my lash on your bare shoulder blades…
I eat quite healthy but also rarely. Not eating for a while doesn't affect me much at all. I'm a weakling anyway physically and live on stamina and no strength. It might be different if I wasn't like that. I don't feel hungry. I have to remind myself to eat. Hunger for me is feeling weak and faint, I try my best to eat before that happens. I'm quite good at it these days.
I'm quite dependent on sleep. Sleeping too little just one night doesn't affect me but my normal sleep need to be 9 hours or I will feel extremely tired. I will feel like my whole systems have rocks grinding through the cogs. A very unpleasant feeling.