Founder of Ottawa Marathon backtracks, says running marathons can cause a host of ailments
Ottawa Sun
Ken Parker, one of the founders of the Ottawa Marathon and former coach of the late Emilie Mondor, one of Canada’s greatest distance runners, now finds himself in the unusual position of trying to dissuade people from attempting the event.
Research suggests that the 42-km marathon — which the fastest men complete in just over two hours, but can take amateurs four hours or longer to finish — can cause heart disease, irregular heartbeats, damage to the immune system, and post-marathon cardiac dysfunction in under-trained runners.
Under-trained amateur marathon runners who run less than 64 km per week often show signs of cardiac dysfunction after the race and some of these abnormalities may persist for up to a month after they cross the finish line. On the other hand, putting in longer distances –more than 95 km per week –can also cause problems. Dr. David Nieman at Appalachian State University in Boone, N.C., found that over-training can depress the immune system, doubling athletes’ chances of getting sick in the days and weeks following the race. When the immune system is stressed, inflammation results, and there is a link between inflammation and diseases such as heart disease, cancer and arthritis. Read full story