CichlidFish.com - Fish That Think.

Curious about sleep deprivation and disease....in 1910 most people slept around 9Hours/night. Next poll would ask those people in eash sleep/night category to rate their health.

Long Hours, Little Sleep Hard on a Guy's Heart

If you are a man who works long hours and never gets enough sleep, you may be begging for a heart attack.

In a new study from Japan, men who often worked more than 60 hours a week and got five hours or less of sleep a night had twice the risk of suffering a heart attack.

The study builds on and confirms previous research, says study author Dr. Ying Liu, a research fellow at the National Cancer Cente in Tokyo and a graduate student at Kyushu University in Fukuoka. It appears in the July issue of Occupational and Environmental Medicine.

"Previous studies in the United States and Europe, as well as in Japan, have suggested that long work hours and insufficient sleep are related to heart attack, and our findings confirm their results," Liu says.

The findings from the Japanese study probably apply to American men as well, Liu says. However, he is not sure whether women are at the same risk if they work to excess and sleep too little because not enough research has been done on them.

In the United States, full-time workers average a 42.9 hour work week, according to the latest figures from the US Bureau of Labor Statistics, although many workers regularly log 60 hours or more.

Details of the Study
Liu and his colleagues evaluated 260 men, aged 40 to 79, who had been admitted to a hospital for a heart attack for the first time. All survived the attack. The researchers compared this group with 445 men with no history of heart attacks who were in the same age range and lived in the same areas.

Study subjects provided information about their usual work week, their sleep habits, and their days off during the past month and the past year. They also discussed any medical conditions that might boost their heart attack risk, such as high blood pressure and high blood cholesterol.

Lack of Sleep and Long Work Hours Increase Risk of Heart Attack
Even when the researchers controlled for the known risk factors, they found that lack of sleep and long hours were associated with heart attack. Those who worked 60-plus hours a week—not uncommon in Japan—had double the heart attack risk of those who worked 40 hours or less. Also, those who suffered heart attacks often slept for five or fewer hours a night.

"The joint effect of work hours and lack of sleep is the unique point of our study," Liu says.

Study's Findings Not Surprising
A US sleep expert calls the study findings interesting, but not surprising.

"The conclusions reflect what we clinically think to be true," says Dr. Susan Sprau, an associate clinical professor of medicine at the University of California, Los Angeles, and a sleep disorders expert at Santa Monica-UCLA Medical Center.

Adequate sleep is crucial for good health, she says, adding that most adults need eight hours of sleep to function best.

Another American expert, cardiologist Dr. Thomas Pickering, calls the study findings "very plausible."

Many experts have talked about the negative effects of stress from too much work and too little sleep, Pickering says. "But here is some fairly concrete evidence that it does matter, that some of us are working ourselves into the ground," he says.

Exactly how the lack of sleep and excess work hours trigger a heart attack is not known for sure. Liu speculates both can increase blood pressure and heart rate, and the chronic stress can induce heart function abnormalities.

Sprau agrees that several theories could explain how lack of sleep and excess work do a double whammy on the heart. They include the "sympathetic drive" theory, in which the activity of the sympathetic nervous system—the so-called "fight or flight" response—might increase to a point where it triggers a heart attack. Or, insufficient sleep might have an adverse effect on blood platelets, which promote clotting, she says.

Reducing the Potential Damage on the Heart
Is there any way to undo the damage if a hectic work schedule is unavoidable and there is no time to get enough sleep?

"You can compensate by taking more days rest if possible, or eat more healthfully to offset the risk," Liu says. "But I don't know whether doing more exercise should be recommended. Maybe moderate exercise, such as walking or jogging, is good for a person with a sedentary job. But it may not be good for one who is tired out with [manual] labor."

Pretty interesting stuff there mate.
I was once apon a time a 80hour plus worker with little sleep and paid for it health wise in the end.

Hi Tony, good to hear from you again, everything going better for you now? yea I found sleep is a must too, and to think scientists at one time thought that we didn't really "need" to sleep at all! I think lack of sleep is a MAJOR contributor to all kinds of health issues we face. What do third-world countries do more than us? They sure pollute their atmosphere more, and they seem to live more, ie don't all die of cancer. Maybe we should take a hint a start with the siestas and fiestas and less stress

OORAH to that brother. lol. being a teenager i rarely get much sleep. mostly cause im either going out with friends or staying up late on the computer gaming.

I'll tell you right now m8, in the Army, anything over 5 hours is heaven, and any more than 8 is lazy

i feel you on that one man. i leave Monday morning at 3 am for MEPS, which is in Miami Fla. my recruiter said that once i get to Parris Island, that ill be up for almost 48 hours just for getting into basic training. thats when my 3 months start. lol. its kinda weird to see my future staring me in the face in 56 hours.

Yeah man I hear ya, I've been in the Army for 12 years...just remember that Basic is just a mind game.

where are you stationed?

I usually go to bed around 2:00 AM, and wake up at 12:00 PM.

So I guess 14 hours of sleep!

Trust me, I speak from experience, if you continue you will pay the price later in life. There are many enzymes/hormones that are produced ONLY during sleep and only during certain hours of sleep. It is important to sleep in-tune with your circadian rhythm. There is definitely TRUTH to the old saying, early to bed and early to rise.......well at least about the "healthy" part not sure about the wealth so don't get to hopeful

7-8 hours but i get like 12 on weekends lol