Marathon Runners Heart Damage

Marathon running may damage heart muscle.
The Time (10/25, Park) "Healthland" blog reports that, "in a new study designed to document exactly what kind of stress that running a marathon put on the heart," researchers "found...that it actually damages the muscle." However, the researchers "were encouraged by the fact that at the three-month follow up, the damage induced by the marathon appeared to have dissipated, and the heart had resumed its normal functions." The research was presented at the Canadian Cardiovascular Congress 2010.