Joe De Sena, founder and CEO of Spartan Race, discusses what drives him to push himself—and others—to their absolute limits. (1:57)Want to try something new that goes beyond setting a marathon PR? Throw some physical challenges into your next event. We take you inside what it is like to try your first-ever obstacle course race. (48:32)In the Kick, what it takes to make thousands of Santas enter a 5-miler, the best way to fuel for cold-weather runs, and the first-ever “Beer Mile” shoe. (1:03:21)This week’s episode is brought to you by Jabra. Listeners can go to jabra.com/runnersworld to sign up for exclusive discounts and special offers on Jabra products like the Jabra Elite Sport Wireless earbuds.Listeners to this show can get a 26% discount on their next—or their first—Spartan Race. Enter the promo code “Run26” after you sign up at Spartan.com.Check out our show page here. Follow us on Twitter (@rwaudio) and Facebook (Runner's World Audio).