After passing through stage 4, REM sleep occurs, which is vital for memory, learning, and processing emotions. Tissue growth and repair take place, hormones are released, and cellular energy is restored.
Stage 4, in particular, is known as the healing stage of sleep. While a person needs all the stages of sleep, deep sleep is the most restorative sleep and is especially helpful for brain health. While REM sleep is not considered deep sleep, you must first cycle through deep sleep to enter the important REM stage. In this stage, your brain is quite active, and you are most likely to dream. Stage 5, or REM sleep, begins about 90 minutes after falling asleep (and reoccurs about every 90 minutes). During deep sleep, breathing, heart rate, body temperature, and brain waves reach their lowest levels. Stage three begins as you enter deep sleep and stage 4 is considered the deepest sleep stage. The first two stages are considered light sleep. There are five stages of sleep that alternate between rapid eye movement (REM) and non-REM (NREM) sleep. Notably, older adults need enough deep sleep to help their bodies function. However, quantity of sleep may not be as crucial as quality: getting a good night’s sleep is imperative to healthy aging. Whether it’s for yourself or an older loved one, you may be wondering, how much sleep do seniors need?Įxperts recommended that adults 65 and older get 7-9 hours of sleep each night. Almost half of older adults report trouble falling or staying asleep. People are often surprised to learn that sleep also changes as we grow older. Many things change with age: physical health and appearance, cognitive abilities, and even personality.
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