University Hospital Zurich

Caffeine limits blood flow to heart muscle during exercise

Published in Physician Law Weekly, February 8th, 2006

In healthy volunteers, the equivalent of two cups of coffee reduced the body's ability to boost blood flow to the heart muscle in response to exercise, and the effect was stronger when the participants were in a chamber simulating high altitude, according to a new study.

"Whenever we do a physical exercise, myocardial blood flow has to increase in order to match the increased need of oxygen. We found that caffeine may adversely affect this mechanism. It partly blunts the needed increase in flow," said Philipp A. Kaufmann, MD, FACC, from the University Hospital Zurich and Center for Integrative Human Physiology CIHP in Zurich.

The study was published...

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Source: Physician Law Weekly (2006-02-08)

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