Exercise may generate new blood vessels
By MARIA CHENG, AP Medical Writer
VIENNA, Austria - Having a bad heart doesn't mean you can skip exercise, doctors said Wednesday. In fact, it may even help your heart to repair itself. Research presented at the European Society of Cardiology meeting showed that exercise sparks the creation of new heart vessels.
In a small study of 37 people at Leipzig University in Germany, Dr. Robert Hollriegel found that people with serious heart failure who rode a bike for up to 30 minutes a day for four months produced new stem cells in their bones.
They also had more small blood vessels in their muscles. Those who didn't exercise had no change in their vessels or muscles.
Most patients with heart failure are over 70 years old, and some can barely walk a few steps without stopping for rest. Doctors think that even these patients would benefit from light exercise such as walking or cycling. To ensure that patients will be able to handle a certain level of physical activity, doctors conduct a test first to determine their maximum limits and to ensure they would not be exceeded. Some exercise regimens also are supervised by health professionals.
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Cleland said that people with heart failure should exercise to a state where they're breathless at least once a day. Pushing the limits of their heart's capabilities should help make it stronger.
"People think that if they have heart failure, then they're at the end of the road and they can't exercise," said Dr. Freek Verheugt, a cardiologist at the University of Nymegen in the Netherlands. "But this study shows that exercise can work to produce new blood vessels, even in patients with serious heart disease."
Because no drugs exist to produce new stem cells, exercise may be the only method for some patients to rebuild their hearts.
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