Why 7 hours? We're being preached the importance of REM sleep, and yet half the REM sleep of the night typically comes between the 7th and 8th hour.
Does anyone know how this reasoning applies to people taking multiple short naps? I had a friend who did this for a semester. What about hyposomniacs? Are they more efficient or is something missing? I have a friend who naturally cannot sleep more than 5 hours a night - he wakes up naturally after 5.
Why 7 hours? We're being preached the importance of REM sleep, and yet half the REM sleep of the night typically comes between the 7th and 8th hour.
Does anyone know how this reasoning applies to people taking multiple short naps? I had a friend who did this for a semester. What about hyposomniacs? Are they more efficient or is something missing? I have a friend who naturally cannot sleep more than 5 hours a night - he wakes up naturally after 5.
edit: I wrote apples instead of applies...