"If you have problems getting out of bed it is because you don't sleep enough, or if you are fat or old you can interrupt your sleep at night(sleep apnea)." Or

"If you have problems getting out of bed it is because you don't sleep enough, or if you are fat or old you can interrupt your sleep at night(sleep apnea)." Or because you are depressed, or any number of other reasons. Writing it off as something as simple as being fat, old, or not sleeping enough is oversimplifying something. "As an exercise, try not to sleep for two days, and try to think in something, it is really hard." This is how I got through my university exams, not staying awake studying for 2 nights before, that would imply I revised, but I cannot sleep for the few nights before an exam, I usually head to lie in bed with hot chocolate around 3am and watch TV until 7, then get up and load up on cappucino. "Do the same two without eating. Write down what you perceive in detail." Again, there are people who, for whatever reason, hyperactivity, lack of appetite, or some faddy diet, do not eat for a couple of days, and manage to function perfectly fine. "Try to stay in bed one entire day if you believe exercise is not important." Load up 120GB of David Attenborough documentaries, and you wont get out of bed for a week.