Washington [US], September 11 (ANI): According to studies, persons in their middle years and older should get seven hours of sleep per night, with too little or too much sleep being linked to worse mental and cognitive functioning.
Washington [US], September 6 (ANI): Seven hours is the ideal amount of sleep for people in their middle age and upwards, with too little or too much little sleep associated with poorer cognitive performance and mental health, say researchers.