Your brainwave activity will show primarily a relaxed, quiet head, with occasional blips of alpha waves that characterize an awake, alert mind. Stage 1 sleep may be described as light, shallow, or transitional, making it easy to wake up. For example, your 90-minute sleep stage map may typically read as follows: In addition to marking the beginning of your sleep period, Stage 1 sleep also occurs between each subsequent stage of sleep. Taking up about five percent of our total sleep time, Stage 1 sleep lasts for about five to ten minutes at a time. Stage 1 (N1) Sleep: Light sleep, nonREM 1 What are the differences among the four stages of sleep?Īll four stage of sleep are essential and serve different purposes. People normally experience three or four sleep cycles per night, their bodies automatically advancing through each stage in sequence, and waking naturally after approximately eight hours.Īlthough nobody knows exactly why most living things sleep, medical research suggests that time spent sleeping is essential for performing essential maintenance and repair within the body. Together, these four sleep stages make up a single sleep cycle, lasting between 60 and 90 minutes each.
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