"New Dimensions in Aerobic Fitness" begins with the development of the VO2max measurement and traces its history from the 1920s to the present. Exercise physiologist Brian Sharkey explores this evolution and its influence on the direction of fitness training and testing. He also traces the beginnings of doubt about VO2max as the measurement of fitness. Most important, "New Dimensions in Aerobic Fitness" revisits an old component of aerobic fitness - endurance fitness. Endurance fitness emphasises duration, stamina, and prolonged effort, and is better related to performance in work and sport. it may also be more closely associated with health. The author includes suggestions for testing endurance fitness.