New German research has indicated that exercise may help the heart to grow stronger and repair itself by instigating the growth of new blood vessels.

Presenting the findings to the European Society of Cardiology, Dr Robert Hollriegel of the Leipzig University in Germany reported that individuals with serious heart failure who cycled for half an hour a day for 16 weeks produced new stem cells in their bones and also exhibited more small blood vessels in their muscles. Non-exercisers in the 37-person study displayed no change in their blood vessels or muscles.

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