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Message: <blockquote data-quote="admin" data-source="post: 2692947" data-attributes="member: 1"><p>The Mayo Clinic's monthly journal is reporting that extreme exercise like marathons or long-distance bike races <a href="http://thechart.blogs.cnn.com/2012/06/04/extreme-endurance-exercise-carries-risks/?hpt=he_c2" target="_blank">can actually be detrimental to health</a>, causing heart problems like irregular heartbeats and cardiovascular scarring. Will it deter die-hard endurance junkies? Almost certainly not, and we hope it doesn't deter any other healthy athletes, either. <a href="http://blisstree.com/move/running/study-marathons-cause-heart-attacks-729/" target="_blank">More »</a>Post from: <a href="http://blisstree.com" target="_blank">Blisstree</a></p></blockquote><p></p>