Photos: Treadmill gives Iditarod champ's dogs an edge In an effort to extend his training season, defending Iditarod champion Dallas Seavey, 28, is taking climate control into his own hands. He’s equipped the trailer with a refrigerator that cools the unit down to almost freezing. In those chilly temperatures, Seavey runs almost full teams on the device for about an hour at a time.August 1, 2015