Is it ok to have only 4 hours of sleep July 8, 2019 16 32 64 128 Is it ok to get only 4 hours of sleep Is it bad to have only 4 hours of sleep Is it okay to have only 4 hours of sleep Is it ok to only get 4 hours of sleep one night Is it ok to sleep only 4 hours a day Is it ok to sleep only 4 hours Sleeping only 4 hours
