Elite marathoner and three-time Olympian Deena Kastor shares what may be the most critical element to her success: her mental game. (1:19)Producer Christine Fennessy runs with the Dog Trotters program in Media, Pennsylvania, which pairs high-energy canines with runners to help them get adopted. Along the way, she gets some tips on running with our best buddies. (18:35) Shoe and gear editor Jeff Dengate finds a staff member with nearly zero shoe sense and takes him for his first proper fitting at our local running store. (34:46)This episode is brought to you by Harrys. Get the close, comfortable shave you deserve. Sign up at Harrys.com/run, and you’ll receive their most popular Trial Set—a $13 value—for FREE, you just cover the shipping.We are also brought to you by Casper, an online retailer of premium mattresses. Get $50 toward any mattress purchase by going to Casper.com/run and using the promo code “Run.”Episode CreditsHost: Christine Fennessy Producers: Sylvia Ryerson, Christine Fennessy and Brian Dalek.The Runner's World Show is a proud part of Panoply.Check out our show page here. Follow us on Twitter (@rwaudio) and Facebook (Runner's World Audio).