The Natural Running Network Podcast is a treasure trove of amazing interviews, with some of the brightest minds in sports medicine, physiologists, athletes and training advice compiled over the past half decade.  It has become a popular resource for endurance athletes that visit regularly to glean the tips on running skill, heart rate training and so much more.  There are literally hundreds of episodes beyond the handful showcased here. Be sure to visit the site often as a new episode is posted weekly.