Tom Ivers, 1944-2005, was an equine physiologist and consultant who was a promoter of Interval Training primarily for Standardbreds, Quarter Horses and Thoroughbred racehorses. His book The Fit Racehorse was a radical change of approach to fitness training in horses. His later version, The Fit Racehorse II, benefits from years of practice and research and is a more extensive work. He is the author of nine books, including Optimized Nutrition for the Athletic Horse, The Bowed Tendon Book and Practical Equine Thermography.
In 1994 he formed the company Equine Racing Systems, Inc., and he was its president until his death in 2005.