Drinking two cups of caffeinated coffee decreases blood flow to the heart during exercise, researchers report, and the reduction may be most pronounced at high altitudes. While healthy people may tolerate the reduced blood flow fairly easily, it may be harmful to people with coronary artery disease.
Caffeine led to a 22 percent drop off in so-called "myocardial flow reserve" at normal oxygen levels and a 39 percent decrease at low-oxygen levels.
SOURCE: Journal of the American College of Cardiology, January 17, 2006
Tuesday, January 17, 2006
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