Caffeine reduces heart's blood flow during exercise

Apr 02 (Reuters Health) - The caffeine in two cups of coffee reduces exercise-induced blood flow to the heart, new research suggests, and the reduction may be largest at high altitudes.

Healthy people seem to take the reduction in blood flow in stride, so mountain climbers may not need to give up their morning cup of coffee at base camp.

But the reduced blood flow might be harmful to people with coronary artery disease, study author Dr. Mehdi Namdar told Reuters Health.

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