When Is Exercise a Risk for Heart Disease?
Exercise is a recommended prescription for the prevention of heart disease and even to prevent a second heart attack. Walking every day for at least 30 minutes is a standard mantra these days if you want to maintain good health. But there is one condition that can actually make outdoor exercise increase your chance of heart disease, and could precipitate a heart attack.
A study published in the New England Journal of Medicine in September 2007 showed that even a short exposure to traffic fumes can put you at risk. Researchers tested the heart health of 20 people who had stable coronary heart disease after pedaling on an exercise bike in normal air, and when exposed to air filled with diesel fumes.
Within six hours, the hearts of the participants who had exercised in the polluted air showed dramatic deterioration. Researchers said even a short burst of exercise in air filled with diesel fumes could increase your risk of a heart attack, especially if you already have a heart condition.
Bottom line: Be aware of pollution and ozone levels where you live. When it’s high, exercise indoors or move away from high traffic areas.
