Dean Karnazes, legendary ultrarunner and author, discusses how he became a runner, his latest book (The Road to Sparta), and some of his most memorable running adventures. (1:33)Why the most important part of your run may just happen in the 10 minutes after you’re done. (44:17)In the Kick, Ed Whitlock crushes another age-group record, several unique Guinness World Records fall at the Toronto Waterfront Marathon and Half Marathon, and can your favorite type of running shoe be injuring you?  (1:01:15)Further reading:Get Stronger With This 10-Minute Workout for RunnersCheck out our show page here. Follow us on Twitter (@rwaudio) and Facebook (Runner's World Audio).