6 or 8 hours’ sleep is always a controversial topic these years. According to a report on Daily Mail, Sarah Chalmers, who is 46 years old attended a sleeping experiment. The following photos show the contrast of her face when she sleeps for 6 and 8 hours.
It’s not hard to see that when Sarah sleeps for 8 hours, she is in fine fettle. While the right side picture, which shows her face after 6 hours’ sleep looks like she is listless and obviously needs more sleep. This photo encourages people have 8 hours’ of sleep for health. We hear an old saying all the time that people spend about 1/3 of their life for sleeping. Based on this saying, it may seem better that if we have 8 hours for sleep (24/3=8). More people suggest 8 hours’ sleep because less sleep may cause cardiovascular and cerebrovascular diseases, further threatens people’s health.
But is that true? 8 is better than 6?
A report called ‘Forget eight hours of sleep a night-we only actually need SIX, scientists declare’ is also posted on Daily mail. This report, rather than the previous one, suggests that people should have 6 or 7 hours’ sleep instead of 8 based on the study on hunter-gatherers. These hunter-gatherers in tribes sleep for 6 or 7 hours but they’re in better health condition than normal people. But draw a crude and rush conclusion just based on merely one study? I really hold my doubt. Because there may be third effect (confounding variables) affects the experiment result like hunter-gatherers innately have better health than normal people as they exercise a lot or the high-nutrition food they eat.
We still can’t tell 6 or 8 hours for sleep, which one is better. However, choosing a healthy lifestyle such as not stay up too late or combine exertion and rest is quite essential for college students. Remember that health is wealth.
Picture Resource: https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjQnprDrJDPAhWM7yYKHSZIBlgQjRwIBw&url=http%3A%2F%2Fnextshark.com%2Fsleep-study-shows-the-visibly-dramatic-difference-between-six-and-eight-hours-of-sleep%2Fsarah-chalmers-lard-as-moisturiser-john-godwin%2F&psig=AFQjCNEdzmCZtBsHlnGp1yAjwCJx5sy1kw&ust=1473993682662741