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Smoking just one cigarette rigid arteries of young adults by 25 percent, says a new study.

And the solidity of the arteries of a person, the greater the risk of heart disease or stroke, and noted researcher Dr. Stella DASKALOPOULOU, internal medicine and vascular medicine specialist at McGill University in Montreal in the health center.

It is measured by hardening of the arteries in smokers and non-smokers, aged between 18 and 30, at rest and after exercise. To establish a baseline measurement, the request of smokers who smoke five to six cigarettes per day, and to refrain from having a cigarette for 12 hours before the first test them in practice. Before the second experiment, exercise, and allowed to smoke one cigarette. Before the final test, they were asked to chew a piece of nicotine gum.

After exercise, and atherosclerosis in non-smokers fell 3.6 percent. But smokers hardening of the arteries increased by 2.2 percent after exercise. In smokers, and hardening of the arteries to increase 12.6 percent after chewing nicotine gum, and 24.5 percent after it had been one cigarette.

There was no difference in the hardening of the arteries among smokers and non-smokers in the rest.

"Our findings are significant because they suggest that smoking only a few cigarettes per day effects on the health of the arteries" DASKALOPOULOU said in a news release from the Heart and Stroke Foundation of Canada. "This was disclosed was very clear when these young people were placed under physical stress, such as exercise."

"In fact, this means that smoking even in light of people to otherwise healthy young man can cause damage in the arteries, compromising the ability of their bodies to deal with physical stress, such as climbing a set of stairs, running to catch the bus," she said. "It seems that this compromise to respond to physical stress occurs first, before the damage to the arteries and it becomes clear in the rest."