Can You Sleep Too Much (Or Too Little)?
“Sleep is that golden chain that ties our health and our bodies together.” – Thomas Dekker
I used to think you could never get too much sleep. Of course, that was years ago when I was chronically sleep deprived due to working full-time, going to college at night, raising my kids as a single mom, and trying to have some sort of social life when they were with their other parent. Turns out, there’s a growing body of research that points to the negative effects of either too much or too little sleep.
Too little or too much sleep can affect metabolic health.
Concerned about an expanding waistline? Prone to getting less sleep or more than you need? There’s scientific basis for the link between too little and too much sleep and metabolic syndrome and increasing waistlines in Korean men and women aged 40-69 years in one recent study. Researchers said the study’s observational nature did not allow for cause and effect conclusions, noting that participants provided sleep duration data and estimates may reflect time in bed and not necessarily time slept. Other studies have reported that short-duration sleepers (less than 5 hours per night) are up to 45 percent more likely to be obese.
Excessive and inadequate sleep can affect memory and cognition.
Chronically sleep-deprived people, says Harvard Health Publishing, are more likely to have high blood pressure, narrowed blood vessels, and diabetes – each of which cause less blood flow inside the brain. Since the brain requires a good flow of oxygen and sugar to work optimally, too little sleep can contribute to memory problems. Those who get too much sleep, on the other hand, aren’t off the hook memory-wise as their quality of sleep may suffer, which could add to thinking and memory problems during the day.
Excessive daytime sleepiness can be particularly troubling for older adults. Researchers found that cognitive deficits and cognitive impairment may be predicted by excessive daytime sleepiness among the elderly. Excessive sleepiness, or hypersomnolence, has two main symptoms: excessive amount of sleep, and poor quality of awakening. Hypersomnolence is the leading cause of road accidents, and is responsible for increased risk of mortality related to neurodegenerative diseases.
If you’re an early riser, you may be less prone to depression.