Even if traffic vapors penetrate the air, it's still better for your heart when you're out and doing sports than sitting in there all day, as a recent study suggests.
While sport was associated with a variety of sports. Health benefits such as a reduced risk of cardiovascular disease Aerial pollution is associated with an increased risk of heart attack, asthma and chronic obstructive pulmonary disease (COPD), said Nadine Kubesch from the University of Copenhagen in Denmark.
For the study, Kubesch and her colleagues analyzed data on air pollution, exercise habits and hospitalization or deaths associated with heart attacks for 51
People living in high-pollution areas were 17 percent more likely to have a heart attack than people living in low-pollution areas during the study, the study found. And those who had a heart attack at the beginning of the study had a 39 percent higher chance of having a heart attack during the follow-up visit than living in very polluted areas.
However, exercise still seemed to help people living in polluted places. For example, adults who regularly exercise in regions with high levels of air pollution were 21 percent less likely to have a heart attack than those who were inactive.
"Our study shows that physical activity also occurs in air pollution … can reduce the risk of heart attack," Kubesch said in a statement. "Our research supports existing evidence that even moderate levels of regular physical activity, such as active commuting, are intense enough to sustain these health benefits."
The researchers studied sports, cycling, hiking and gardening and found all these activities (19659002) Cycling, gardening and hiking were associated with a lower risk of recurrence in people already suffering from heart attacks. It did not take much to make a difference.
Compared to people who had physical activity for less than half an hour a week, those who came from half an hour to four hours of exercise were 23 percent less likely to have had a first heart attack and people over four hours worked 28 percent less risk.
When researchers studied only physical outdoor activities, it was associated with a 19 percent lower rate of heart attack risk for half an hour to four hours per week, and more than four hours reduced risk by 24 percent.
Repetitive heart attacks also seemed to benefit outdoor exercise: half an hour to four hours of activity was associated with a 45 percent lower risk of heart attack, and more than four hours cut the risk in half.
The study was not a controlled experiment to prove whether or how pollution or exercise habits could directly affect heart attack risk. Another limitation is that researchers lacked data on changes in participants' exercise habits or exposure to air pollution over time.
In addition, the study area did not include areas of exceptionally high pollution levels, so the results can not be generalized
It is also important to note that exercising in a place with higher levels of air pollution is not as beneficial as the same physical one Activity in a place with clean air, said Dr. George Thurston, Director of the Human Exposure and Health Impact Program at New York University's Medical School in New York City
"Exercise is good for your heart, regardless of air pollution, but training on low pollution is healthier than that Running at high levels of pollution, "said Thurston involved in the study, communicated by e-mail. "This caution against training in high air pollution is even more important to consider when people have pre-existing respiratory or heart disease."