Is Distance Running Healthy for Your Heart?

The effects of long distance running is debated regulary by medical experts. While it is true that long-term endurance athletes have had some scarring noted in the heart muscle, it is at this point an association and not a causation. There is concern because if scarring of the heart muscle (fibrosis) becomes severe, it can lead to thickening of portions of the heart which can impact heart functioning. The discussion really hinges on two articles.
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