|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon UK||2 days ago||45.43||$27.77||You save $17.66|
|Amazon US||3 days ago||39.95||$27.77||You save $12.18|
|Book Depository US||2 days ago||30.58||$27.77||You save $2.81|
Ross Tucker, PHD, serves as scientific editor of Runner's World South Africa, a consultant technical expert with Adidas South Africa, and editor of Health 24, South Africa's largest fitness- and health-related Web site. Tucker, a competitive runner himself, lives in Cape Town, South Africa. Jonathan Dugas, PhD, holds a post-doctoral fellowship with the University of Chicago. He is the co-creator, with his colleague Ross Tucker, of the popular Science of Sport blog. A qualified USA Cycling coach, he lives in Chicago.