Slaves of the Slave System Plantation agriculture was wasteful, largely because King Cotton and his money-hungry subjects despoiled the good earth; quick profits led to excessive cultivation, or âland butchery,â which in turn caused a heavy leakage of population to the West and NW.
It means that since most adults need 8-9 hours of sleep, they will need about 1.6-1.8 hours of deep sleep to feel fully functional next day. However, the time of deep sleep is changed and that's mainly due to the change in the sleep need of different group of people. For instance: Age Group.
Limit naps to 20 minutes (see my last tip for an alternative). Napping for longer than 20 minutes can allow the person to enter deep sleep and to then wake up from deep sleep. Sleep inertia lasts longer and the effects are worse when you wake up from deep sleep. Avoid napping between 22:30 and 04:40 hrs.