From the time they hit puberty until the age of 22, adolescents need about 9 hours of sleep a night to function optimally—to be physically, mentally and cognitively healthy. Tell this to nine out of ten teenagers (or their parents
From the time they hit puberty until the age of 22, adolescents need about 9 hours of sleep a night to function optimally—to be physically, mentally and cognitively healthy. Tell this to nine out of ten teenagers (or their parents