Andrew R. Coggan, Ph.D. - is an internationally-respected exercise physiologist who has published numerous scientific articles on diverse topics such as the effects of carbohydrate feedings on cycling performance, the physiological adaptations to endurance training, and the effects of aging on muscle metabolism during exercise. A national-caliber masters cyclist, he is also widely recognized as one of the leading experts on the use of powermeters in training. He was a featured presenter at the first ever power-based cycling training seminar held in the United States, and has written the chapter on power-based training for USA Cycling’s Expert Coaches Manual. His prolific posts to the “wattage” mailing list hosted on topica.com have also enlightened many about the physiology of exercise and training in general, and the use of powermeters in particular. Normalized power, intensity factor, and training stress score, which are featured in the CyclingPeaks software, as well as the concept of “power profiling” to identify a rider’s relative strengths and weaknesses, are ideas that he developed specifically as a result of his interactions with, and to meet the needs of coaches such as, Hunter Allen. Andy was also responsible for assuring the physiological validity of other aspects of the CyclingPeaks software, such as the default parameters for used in the graphs and charts.