What do you understand by sleep deficit? Why does the amount of sleep required to rejuvenate people vary from one person to another

What do you understand by sleep deficit? Why does the amount of sleep

1.	What do you understand by sleep deficit? Why does the amount of sleep required to rejuvenate people vary from one person to another
Answer» What do you understand by sleep deficit? Why does the amount of sleep required to rejuvenate people vary from one person to another