It is not genetics that determines whether you are an 'early riser' or an 'evening owl'. It is mostly habitual and environmental.
Early research found a connection between night owls and developing schizophrenia later in life. On average, owls also have lower wellbeing and are more likely to develop depression. It could be that owls are experiencing constant jet lag, which may put their bodies under stress.
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Perhaps sleep arose to group the body's processes, ensuring that specific processes don't conflict with one another.
Past research found that carriers of a particular gene slept for about 2 hours less than non-carriers. They also found short sleepers who did not carry this gene but had another mutation that appeared to be linked with short sleep.
Natural short sleepers don't seem to suffer health problems associated with getting too little sleep. But it could be that short sleepers are really efficient sleepers.
About 80% of our sleeping is of the SWS variety, identified by slow brain waves, relaxed muscles and deep breathing.
Deep sleep is important for the consolidation of memories. New experiences get moved to long-term storage and less important experiences from the previous day get cleared out.
When thinking about getting the sleep you need, it’s normal to focus on how many hours of sleep you get. While sleep duration is undoubtedly important, it’s not the only part of the equation.
It’s also critical to think about sleep quality and whether the time spent sleeping is actually restorative. Progressing smoothly multiple times through the sleep cycle, composed of four separate sleep stages, is a vital part of getting truly high-quality rest.
Although snoring may be harmless for most people, it can be a symptom of a life-threatening sleep disorder called sleep apnea, especially if it is accompanied by severe daytime sleepiness.
Sleep apnea can be treated; men and women who snore loudly, especially if pauses in the snoring are noted, should consult a physician.