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Wednesday, June 9, 2010

Watching TV increases risk of death from heart disease.

Every hour spent watching television each day increases the risk of dying from heart disease by almost a fifth, say scientists.

Couch potatoes were warned that their lifestyle also increased the risk of death from other causes including cancer.

People who spent hours watching television greatly increased the chances of dying early from heart attacks and strokes, researchers in Australia found. Compared with those watching less than two hours of TV, people who sat in front of the box for more than four hours a day were 80% more likely to die for reasons linked to heart and artery disease.

The researchers monitored 8,800 adults for six years to see what impact watching television had on their long-term health. They found that each hour a day spent in front of the television increased the risk of death from all causes by 11%. It also raised the risk of dying from cancer by 9% and the risk of heart disease-related death by 18%.

The scientists warned it was not only telly addicts whose lifestyles put them in danger. Any prolonged sedentary behaviour, such as sitting at an office desk or in front of a computer, posed similar risks. It also made no difference whether or not a person was overweight or obese.

"Even if someone has a healthy body weight, sitting for long periods of time still has an unhealthy influence on their blood sugar and blood fats," said the study's lead researcher, Prof David Dunstan, from the Baker IDI Heart and Diabetes Institute in Victoria, Australia.

The average amount of TV people watch each day is three hours in Australia and the UK, said the scientists. In the US, where two-thirds of adults are overweight or obese, some people spent eight hours watching television ‑ the equivalent of a nine to five working day.

"What has happened is that a lot of the normal activities of daily living that involved standing up and moving the muscles in the body have been converted to sitting," said Dunstan.

"Technological, social, and economic changes mean that people don't move their muscles as much as they used to, and consequently the levels of energy expenditure as people go about their lives continue to shrink. For many people, on a daily basis they simply shift from one chair to another ‑ from the chair in the car to the chair in the office to the chair in front of the television."

The scientists interviewed 3,846 men and 4,954 women aged 25 and older who underwent sugar tolerance tests and provided blood samples. Participants were recruited from 1999 and studied for the next six years. Based on their own reports of TV viewing they were grouped according to whether they watched less than two hours a day, between two and four hours, or more than four hours.

During the follow-up period there were 284 deaths, 87 from cardiovascular, or heart and artery disease, and 125 from cancer.

While the association between cancer and television viewing was modest, there was a strong link between TV watching and a higher risk of cardiovascular death. This was despite taking account of recognised heart disease risk factors such as raised cholesterol levels and lifestyle.

The findings were reported today in Circulation: Journal of the American Heart Association.

Dunstan had this message for members of the public: "In addition to doing regular exercise, avoid sitting for prolonged periods and keep in mind to 'move more, more often'. Too much sitting is bad for health."

Friday, June 4, 2010

Found this in my bed....

This is the "Wolf Spider." I found this in my bed this morning when returning from getting something to drink.

From Wiki: There are many genera of Wolf spider, ranging in body size from less than 1 to 30 millimetres (0.04 to 1.18 in).  They have eight eyes arranged in three rows. The bottom row consists of four small eyes, the middle row has two very large eyes (which distinguishes them from the Pisauridae), and the top row has two medium-sized eyes. They depend on their eyesight, which is quite good, to hunt. Their sense of touch is also acute.

Wolf spiders are unique in carrying their eggs along with them in a round silken globe, or egg sac, which they attach to the spinnerets at the end of their abdomen. The abdomen must be held in a raised position to keep the egg case from dragging on the ground, but they are still capable of hunting while so encumbered. Also unique to wolf spiders is their method of infant care. Immediately after the little spiders hatch and emerge from their protective silken case, they clamber up their mother's legs and all crowd onto her abdomen.

Their eyes reflect light well, and one method of finding them is to hunt at night using a flashlight strapped to one's forehead so that the light from the flashlight is reflected from their eyes directly back toward its source. This is also especially helpful because the wolf spiders are nocturnal and will be out hunting for food, making it easier to find them.

Because they depend on camouflage for protection, they do not have the flashy appearance of some other kinds of spiders. In general their coloration is appropriate to their favorite habitat.

Great, just what I always wanted. Ya know I was worried about roaches when we moved here. But, apparently these spiders feed on roaches which would be a good thing, if I didn't think the little bastards might feed on me.

Wolf spiders will inject venom freely if continually provoked. Symptoms of their venomous bite include swelling, mild pain and itching. Though usually considered harmless to humans, the bite of some species may be painful. In the past, necrotic bites have been attributed to some South American species, but further investigation has indicated that those problems that did occur were probably actually due to bites by members of other genera. Australian wolf spiders have also been associated with necrotic wounds, but careful study has likewise shown them not to produce such results. Wolf spiders are capable of defensive bites, and some South American species may give bites that are medically significant. However, in general their presence works very much in favor of humans wherever they are found.

If guys haven't heard from me in a while, you may come and check that I am not spun into a web being feasted upon by some "Wolfy Spider."


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