http://www.runnersworld.com/taxonomy/term/479/1 en http://www.runnersworld.com/elite-runners/racing-news-may-24-morning-report Mary Cain tests her versatility; Caster Semenya not racing. May 24, 2013 Peter Gambaccini 162336 http://www.runnersworld.com/treadmills/how-smartphones-affect-treadmill-running Music good, texting not so much. May 24, 2013 Scott Douglas 162266 http://www.runnersworld.com/injury-prevention-recovery/weak-hips-lower-leg-injuries-appear-linked Hip flexor strength is one key element. May 23, 2013 Scott Douglas 162201 http://www.runnersworld.com/races/races-well-be-watching-this-weekend-0 The Diamond League comes to NYC; Colorado hosts BolderBoulder. May 24, 2013 Peter Gambaccini 162196 http://www.runnersworld.com/running-shoes/running-shoes-have-large-carbon-footprint Most of it comes from the manufacturing process, study finds. May 23, 2013 Scott Douglas 162151 http://www.runnersworld.com/elite-runners/caster-semenya-may-not-race-in-2013 Reports say the South African 800-meter star is not training. May 23, 2013 Peter Gambaccini 162141 http://www.runnersworld.com/races/south-boston-latest-town-to-cut-number-of-road-races State rep wants yearly cap of 4 races. May 23, 2013 Scott Douglas 162116 http://www.runnersworld.com/elite-runners/racing-news-may-23-morning-report Running Boston's final mile; U.S. teams ready for BolderBOULDER. May 23, 2013 Peter Gambaccini 162101 http://www.runnersworld.com/general-interest/boston-marathon-medal-earns-funds-for-charity-on-ebay Seller hopes the idea can be replicated. May 23, 2013 Michelle Hamilton 162071 http://www.runnersworld.com/races/pre-classic-should-have-2013s-best-mile Olympic medalists, world champ are entered. May 22, 2013 Peter Gambaccini 162051