Arnie Baker, MD, author of Smart Cycling, is a licensed USCF coach and practicing physician. He has coached racers to more than fifty U.S. National Championships and dozens of United States records. Dr. Baker serves on the fitness board of and is a frequent contributor to Bicycling magazine. A medical consultant to USA Cycling and the USCF, he is also a category 1 USCF racer, a five-time national champion, and a five-time United States record holder.