Which of the below substances is a heavy metal solid at room temperature, that poisons water and can be found in old paint? *
O Lead
Radon
Carbon Monoxide
Ultraviolet (UV) Rays
Mercury

That is

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