From USA Today online…
Running a marathon can impact heart for months
Thousands of runners participate in the Bank of America Chicago Marathon Oct. 10, 2010.
By Kathleen Doheny, HealthDay
Running a marathon can damage your heart, with more than half of the segments in the heart's main pumping chamber typically functioning a little under par during the race, a new study shows.
The good news? Other parts of the heart pick up the slack and the changes reverse within three months or fewer after the run, the researchers found. The more fit and trained a runner is, the less effect the strain of a marathon was found to have on the heart.
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