In a typical full night of sleep,young adults spend the greatest amount of time (about 50 percent)in

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Young adults spend the greatest amount of time (about 50 percent) in NREM-2 sleep, which is characterized by slower brain waves and periods of muscle relaxation. NREM-1 and NREM-3 sleep both make up smaller percentages of the sleep cycle, while REM sleep typically lasts for about 20% of the night's sleep.

In a Typical Full Night of Sleep,young Adults Spend the Greatest