Study: Too much running may not be good for your heart

[KMSP-TV Fox 9, February 03, 2015] Is too much running too much for you? A new study out of Denmark shows more running at a fast pace may not be as healthful as a more leisurely jog. Minneapolis Heart Institute cardiologist and Minneapolis Heart Institute Foundation researcher Dr. Rob Schwartz talked with Fox 9 News about the study and his own research about long term marathoners.