Overall rejuvenates your body - Your body needs to rest, that should be a common fact, yes you have the choice of staying up but the fact stays true nonetheless, your body needs that time to calm down and relax when you’re sleeping, if you wanna continue having all the energy you get day in day out, the only answer to that is a good night’s sleep consistently, through sleep you’re able to rejuvenate your body day after day after day, so use that sleeping time wisely, it’s your health and your choice in the end, but atleast use them for the greater good of your own body.