Internally Peer Reviewed Nearly a third of our life is spent asleep.
Infants spend most of the day asleep.
With a natural aging there is evolution to the lighter, slightly shorter, less deep and more interrupted sleep of old age. Few elderly have symptoms. Keep a sleep diary with records of time to bed and to sleep, total sleep time, number of awakenings, time up and whether you awake refreshed. Eighty percent of the elderly say they wake refreshed. Seventy percent sleep 30 minutes but this lengthens to 60 minutes over 80.