A number of vital tasks carried out during sleep help maintain good health and enable people to function at their best. Sleep needs vary from individual to individual and change throughout your life. The National Institutes of Health recommend about 7-9 hours of sleep each night for older, school-aged children, teens, and most average adults; 10-12 for preschool-aged children; and 16-18 hours for newborns. There are two stages of sleep; 1) REM sleep (rapid-eye movement), and 2) NREM sleep (non-rapid-eye movement). The side effects of lack of sleep or insomnia include:
Karen is a 47-year-old teacher who is training for her first 5K road race. She runs 3 to 4 days each week, then walks the other days. Over the past 2 weeks, she has begun to experience pain in the outside of her right hip. Her pain is worst while running and lying on her right side; she experiences hip pain and stiffness when taking her first steps in the morning and walking up stairs, and also notes a dull ache with prolonged sitting and standing. She typically performs stretches for 5 minutes before her runs. Karen had not run consistently before she began training for the 5K.