Danny Abshire is the cofounder of Newton Running, a Boulder, Colorado, company that makes shoes that promote an efficient midfoot/forefoot running gait. He has been making advanced footwear for runners and triathletes for more than 20 years. Brian Metzler is a senior editor at Running Times magazine, a running coach, and a former collegiate track runner. He is an award-winning journalist who has written about various topics in running and conducted running shoe wear testing for magazines since the late 1990s. He was also the founding editor of Trail Runner magazine in 1999.