According to Lawrence Kohlberg, what is the name of the stage where young people lose some of their selfishness as they learn to define right and wrong in terms of what pleases parents and conforms to cultural norms?

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