Mythes sur le sommeil

Je reçois régulièrement des courriels hebdomadaires de Beachbody.com, site où se vendent des DVD d'entrainement que j'utilise, Turbo Jam, ou que mon chum fait, Power 90 Xtrem ou Xtrem + (mais lui, il est fou lol). Cette semaine, un des sujets était les mythes sur le sommeil et j'ai pensé que ça pourrait intéresser du monde, car parfois certains mythes sont tellement ancrés dans notre vie qu'on les croit vrais. En anglais malheureusement, alors désolée pour ceux/celles qui aiment moins lire anglais. ;)

1. You should get 8 hours of sleep every night. The latest studies show that mortality rates were lowest among those who slept between 6.5 and 7.5 hours a night. People who slept much more or less had more health problems across the board. It was hard to tell why people who slept more had poorer health. There may have been a chicken-and-egg scenario where they may have slept more because they suffered from depression, alcoholism, or other debilitating mental illnesses that caused them to spend more time in bed. On the other hand, the people who didn't get enough sleep were prone to their own health problems, including problems resulting from stress and lack of concentration, alertness, and physical ability—not to mention falling asleep at the wheel.

3. Burning the midnight oil is more productive. Haven't we all pulled an all-nighter? It's a grand tradition that many feel provides its own inspiration. I know that I'm a self-avowed night owl, and you could never convince me that I could get more done in the morning than in the late hours of the night. But a study from the University of North Texas discovered that undergraduate students who were "morning" people had much higher grade point averages than their nocturnal counterparts. The night owls had significantly impaired concentration during the day and poorer memory. So apparently, "early to bed, early to rise" does "make a man healthy, wealthy, and wise" . . . or at least wise. The jury's still out on the others.

4. Exercising before bed will keep you awake. A Brazilian study showed that while heavy aerobic exercises and anaerobic/strength training exercises had little to poor effect on sleep patterns, light to moderate aerobic exercise, like a relaxing walk or a medium aerobic workout, actually helped people sleep better. The old saw about jumping around to "get the blood moving" actually proves to work the opposite way. People who engaged in a bit of light exercise before bed fell asleep more quickly and stayed asleep longer than the more sedentary members of the test group. A UCLA study also found that in older adults (59 to 86 years old), a regular tai chi regimen (regardless of when it was practiced) seemed to provide better sleep schedules and fewer sleep disturbances compared to doing nothing.

5. Sleep is the fountain of youth. That may be a stretch, but a University of Chicago study has shown a strong correlation between lack of deep sleep and physical decline as we age. They studied the level of human growth hormone production in study participants, and found that the people who slept longer in a state of deep sleep produced significantly more of the hormone, which contributes to muscle maintenance and lower body fat. When the participants' sleep was purposely disturbed by the scientists, they produced much less of the hormone. So both the quantity and the quality of the sleep was found to be important in the production of this antiaging hormone. Just think, if all those baseball players had gotten more good nights' sleep, we wouldn't be having Congressional hearings.

6. Insomniacs are more productive. A study from the Tufts New England Medical Centre in Boston found that in the four companies (airline, manufacturer, pharmaceutical company, and law firm) with a little over 4,000 total employees, the loss of productivity due to sleep issues added up to about $54 million. Much of these costs were attributed to prescriptions for sleep aids, sleep-related disorders like depression, and safety-related costs due to people falling asleep on the job. The rest had to do with general productivity loss. The study estimated the cost of insomnia as 2-1/2 weeks of productivity annually for every worker.

7. Spicy food gives you weird dreams. This actually may be true. A team of researchers from Australia found that participants who ate spicy meals before bed took longer to get to sleep and didn't sleep as long or as deeply as those who ate blander dishes. Some of the evidence is attributed to the obvious indigestion that can occur, but the slight elevation in body temperature caused by the zesty food was linked to poor sleep in previous studies. No real results as to the weird dreams or nightmares of the participants, but suffice it to say, spicy food doesn't equal sweet dreams or at least not good sleep.

http://www.milliondollarbody.com/newsletters/NL_featured.htm

Je sais qu'il manque le point 2 et c'est volontaire : je ne le trouvais pas aussi intéressant que les autres. hihi