Today I Learn… I make a point of learning something new everyday. This is what I learn each day

1, Apr 12, 2014

What could happen if you don’t have enough sleep

Filed under: Sleep — admin @ 12:37 am

I read this article on the “Horrible Things That Happen If You Don’t Get Enough Sleep.” Read this article if you don’t want it to truly happen to you. I have the full list here, hoping my children will read it someday.

“Almost 40% of Americans get less than 7 hours of sleep a night, a recent Gallup poll found, and an estimated 70 million Americans have a sleep disorder. Everyone knows that it’s important to get enough sleep — but you may not realize just how many things can go wrong when you don’t.
Here are 25 unfortunate risks of partial and total sleep deprivation, some more common than others.
1. Irritability
“Complaints of irritability and [emotional] volatility following sleepless nights” are common, a team of Israeli researchers observed. They put those complaints to the test by following a group of underslept medical residents. The study found that the negative emotional effect of disruptive events — things like being interrupted while in the middle of doing something — were amplified by sleep loss.

2. Headaches
Scientists don’t yet know exactly why sleep deprivation leads to headaches — but it’s a connection doctors have noticed for more than a century. Migraines can be triggered by sleepless nights, and 36 to 58% of people with sleep apnea wake up with “nondescript morning headaches.”

3. Inability to learn
Sleepiness has long been an issue among adolescents. One study of middle school students found that “delaying school start times by one hour, from roughly 7:30 to 8:30, increases standardized test scores by at least 2 percentile points in math and 1 percentile point in reading.”
But it’s not just kids. Short-term memory is a crucial component of learning, and sleep deprivation significantly impaired the ability of adult volunteers to remember words they’d been shown the day before. In another study, researchers found that while people tend to improve on a task when they do it more than once, this isn’t true if they are kept awake after they try it the first time — even if they sleep again before doing it again.

4. Weight gain
People who are underslept seem to have hormone imbalances that are tied to increased appetite, more cravings for high-calorie foods, a greater response to indulgent treats, and a dampened ability to control their impulses — a very dangerous combination. It’s true that you burn more calories when awake, but not nearly enough to cancel out the many excess calories you consume when exhausted.

5. Poor vision
Sleep deprivation is associated with tunnel vision, double vision, and dimness. The longer you are awake, the more visual errors you’ll encounter, and the more likely you are to experience outright hallucinations.

6. Heart disease
When researchers kept people awake for 88 hours, their blood pressure went up — no big surprise there. But even subjects who were allowed to sleep for 4 hours a night had an elevated heart rate when compared to those getting 8 hours. Concentrations of C-reactive protein, a marker of heart disease risk, increased in those fully and partially deprived of sleep.

7. Slowness
Your reaction time is severely impeded when you don’t get enough sleep. When researchers gave West Point cadets two tests that require quick decision-making, some were allowed to sleep between the tests, while others were not. Those who had slept did better the second time — those who had not did worse, and their reactions slowed down. A study in college athletes found similar results.

8. Infection
You know that great thing your immune system does, where when you get an open wound of some kind it doesn’t always get infected immediately? Prolonged sleep deprivation and even one night of sleeplessness can impede your body’s natural defenses against microorganisms.

9. Economic risk-taking
Planning to make some changes to your portfolio? You might want to make sure you’re well-rested. “A single night of sleep deprivation evoked a strategy shift during risky decision making such that healthy human volunteers moved from defending against losses to seeking increased gains,” researchers concluded.

10. Overproduction of urine
When people sleep, the body slows down its normal urine production. This is why most people don’t have to pee in the night as much as they do during the day. But when someone is sleep deprived, this normal slowdown doesn’t happen, leading to what researchers call “excess nocturnal urine production.” This condition may be linked to bed wetting in children and, in adults, it’s tied to what’s called nocturia — the need to use the bathroom many times during the night.

11. Distractedness
Having trouble paying attention to what you’re reading or listening to? Struggling with anything that requires you to truly focus? “Attention tasks appear to be particularly sensitive to sleep loss,” researchers have noted. If you want to stay alert and attentive, sleep is a requirement. Otherwise, you enter “an unstable state that fluctuates within seconds and that cannot be characterized as either fully awake or asleep,” and your ability to pay attention is variable at best.

12. Less effective vaccines
Vaccines work by spurring your body to create antibodies against a specific virus. But when you don’t sleep, your immune system is compromised, and this doesn’t work quite as well. In one small study, 19 people were vaccinated against Hepatitis A. Ten of them got 8 hours of sleep the following night, while the rest pulled an all-nighter. Four weeks later, those who had slept normally had levels of Hepatitis A antibodies almost twice as high as those who’d been kept awake. Another study found that a sleepless night did not have a long-term effect on
immunity after a flu vaccine, it concludes that the effect might be specific to certain diseases. “Sleep should be considered an essential factor contributing to the success of vaccination,” the Hep A researchers wrote.

13. Impaired speech
Severe sleep deprivation might make you sound like a bumbling idiot — much like having way too much to drink. “Volunteers kept awake for 36 hours showed a tendency to use word repetitions and clichés; they spoke monotonously, slowly, [and] indistinctly,” one study noted. “They were not able to properly express and verbalize their thoughts.”

14. Colds
If you’re wondering why you’re sick all the time and seem to pick up every bug that travels around the office, it’s probably because you’re not getting enough sleep. When a group of 153 people were exposed to a common cold, those who had gotten less than 7 hours of sleep in the two weeks prior were almost 3 times more likely to get sick than those who’d had 8 or more hours of sleep. How well you sleep is also a factor – those who had spent 92% of their time in bed actually asleep were 5.5 times more likely to catch a cold than those who had been peacefully slumbering 98-100% of the time they were in bed.

15. Gastrointestinal problems
One in 250 Americans suffer from Inflammatory Bowel Disease (IBD), and sleep deficiencies make its symptoms much worse. Regular sleep loss also makes you more likely to develop both IBD and inflammatory bowel syndrome, which affects an estimated 10-15% of people in the U.S. And patients with Crohn’s disease were twice as likely to experience a relapse when they weren’t getting enough sleep.

16. Car accidents
Drowsy driving is often compared to drunk driving: You really shouldn’t do either. “Motor vehicle accidents related to fatigue, drowsy driving, and falling asleep at the wheel are particularly common, but often underestimated,” one review concluded. Pilots, truck drivers, medical residents, and others required to stay awake for long periods of time “show an increased risk of crashes or near misses due to sleep deprivation.”

17. Depleted sex drive
Testosterone is an important component of sexual drive and desire in both women and men. Sleeping increases testosterone levels, while being awake decreases them. Sleep deprivation and disturbed sleep, consequently, are associated with reduced libido and sexual dysfunction, and people suffering from sleep apnea are at particular risk.

18. Pain
People in pain — especially those suffering from chronic pain — tend not to get enough sleep. This makes sense: Pain can wake you up in the night and make it hard to fall asleep in the first place. But recently, researchers have begun to suspect that sleep deprivation may actually cause pain or at least increase people’s sensitivity to pain. One study found that after research subjects were kept awake all night, their pain threshold — the amount of painful stimulus they were able to endure — was lower.

19. Diabetes
Being awake when your body wants you to be asleep messes with your metabolism, which in turn increases your risk for insulin resistance (often called “pre-diabetes”) and type 2 diabetes. “Interventions to extend sleep duration may reduce diabetes risk,” one study in adolescents concluded. And four large studies in adults found a strong association — though not a cause-effect relationship —between regular sleep loss and the risk of developing diabetes, even after
controlling for other habits that might be relevant.

20. Sloppiness
Most people notice that when they’re sleepy, they’re not at the top of their game. One study found that one sleepless night contributed to a 20-32% increase in the number of errors made by surgeons. People playing sports that require precision — shooting, sailing, cycling, etc. — also make more mistakes when they’ve been awake for extended periods of time.

21. Cancer
Scientists are just beginning to investigate the relationship between sleep and cancer, and different kinds of cancer behave differently. But since disrupted circadian rhythm and reduced immunity are direct results of sleep deprivation, it’s no surprise that preliminary research seems to indicate that people who don’t get enough sleep are at increased risk for developing certain kinds of cancer, most notably colon and breast cancers.

22. Memory problems
Sleep disruptions in the elderly can lead to structural changes in the brain that are associated with impaired long-term memory — and sleep-related memory deficits have been observed in the general adult population as well. As early as 1924, researchers noticed that people who slept more forgot less. Poor sleep and not enough of it have also been linked to higher levels of β-Amyloid, a biomarker for Alzheimer’s.

23. Genetic disruption
A 2013 study shed some light on why sleep is tied to so many different aspects of our health and wellness. Poor sleep actually disrupts normal genetic activity. After one week of sleeping less than 6 hours per night, researchers found that more than 700 genes were not behaving normally, including some that help govern immune and stress responses.

Some genes that typically cycle according to a daily (circadian) pattern stopped doing so, while others that don’t normally follow a daily pattern began doing so. What does this mean? Just one week of less-than-ideal sleep is enough to make some of your genetic activity go haywire.

24. Unhappiness and depression
In a classic study led by Nobel Prize-winning psychologist Daniel Kahneman, a group of 909 working women kept detailed logs of their moods and day-to-day activities. While differences in income up to $60,000 had little effect on happiness, a poor night’s sleep was one of two factors that could ruin the following day’s mood. (The other was tight deadlines at work.)

Another study reported higher marital happiness among women with more peaceful sleep, although it’s hard to say whether happy people sleep better, better sleep makes people happier, or — most likely — some combination of the two. Insomniacs are also twice as likely to develop depression, and preliminary research suggests that treating sleep problems may successfully treat depressive symptoms.

25. Death— a higher risk of dying sooner than you otherwise might.

1, Mar 9, 2013

Poor sleep is said to alter the workings of the human body

Filed under: Sleep — admin @ 12:20 am

A group of British researchers say that bad sleep “dramatically” alters body, reported by James Gallagher.

“The activity of hundreds of genes was altered when people’s sleep was cut to less than six hours a day for a week,” which explain how poor sleep damaged health.

“Heart disease, diabetes, obesity and poor brain function have all been linked to substandard sleep,” even though they don’t know why missing sleeping hours can actually alter health.

Researchers at the University of Surrey found that more than 700 genes were altered as the result of missing sleep hours. Each contains the instructions for building a protein, so those that became more active produced more proteins – changing the chemistry of the body.

The conclusion is “Clearly sleep is critical to rebuilding the body and maintaining a functional state, all kinds of damage appear to occur – hinting at what may lead to ill health. If we can’t actually replenish and replace new cells, then that’s going to lead to degenerative diseases.” “…sleep is fundamentally important to regenerating all cells.”

1, Sep 8, 2012

A good night sleep is better than any health maintenance supplements

Filed under: Sleep — admin @ 12:06 am

On 8/24, when I talked to my mother over the Skype, she told me this. Knowing I often burned midnight oil, she said “Without adequate sleep, it is useless to take those health supplements like fish oil and calcium. Very often when you don’t feel well, a good rest will help you get better. It is the best medicine when you are tired.”

Do I believe that? Of course. Actually I have already experienced the benefit of a good sleep now. When the children were little and when I had a lot on my plate, the only way to get things done was to cut short my sleep time.

At that time I seldom went to bed before 12 midnight. In fact, I often worked till 2 or 3 in the morning. During daytime, my eyes were wet all the time from constant yawning.

That’s how I worked and got my degree when my son was little and how I learned Oracle when my daughter was two years old. That’s how I worried my head off through my children’s school years. Well, blame my worrisome nature.

I think I have shortchanged my body during those years. I hope I don’t have to pay for it now. Of course, my biggest hope is my children will have a lot easier time than I once did.

1, Aug 6, 2012

Harvard medical school offers online 8 tips to a good night’s sleep

Filed under: Sleep — admin @ 12:21 am

This is from Harvard medical school. Lack of sleep can have serious effects on health, increasing the risks for obesity, heart disease, and type 2 diabetes.

Sleep issues can plague us as we get older. “Later in life there tends to  be a decrease in the number of hours slept,” says Dr. Karen Carlson, associate professor of medicine at Harvard Medical School and director of Women’s Health Associates at Massachusetts General Hospital.

Many people turn to sleep medications in search of more restful slumber.  However, these drugs can have side effects ranging from appetite changes  to dizziness, drowsiness, dry mouth, and strange dreams. A study in the  British Medical Journal (BMJ) found that people who were taking hypnotic  drugs had a higher incidence of cancer, and death, than people who didn’t  take these sleep medicines.

But before turning to pills, here are eight tips for getting a better night’s sleep:

1) Exercise at some point during the day.
2) Reserve your bed for sleep and sex—not work or TV.
3) Keep the bedroom comfortable.
4) Start a sleep ritual.
5) Have a bedtime snack—but not too much.
6) Avoid alcohol and chocolate before bed.
7) Wind down before going to bed.
8) See your doctor about what’s keeping you up at night.

1, Jul 25, 2012

Sleep’s secret repair and other functions

Filed under: Sleep — admin @ 12:15 am

I read this article back on 4/15/2012. It is from Scientific American Mind, May/June issue “Sleep’s secret repairs” “Slumber may loosen the links that undergird knowledge, restoring the brain daily to a vibrant, flexible state” by Jason Castro.

“Emerging evidence suggests that sleep also serves as a reset button, loosening connections throughout the brain to put this organ back in a state in which learning can take place.”

I thought of my two children when I read this piece.

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