18 peacefui.
17 food that you eat when you are feeling stressed or
depressed, usually unhealthy food like chocolate

O o o o o o o o o k(My answer had to be at least 20 characters long)

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle

Answer compression tablet;