Jack Daniels, a two-time Olympic medalist in the modern pentathlon and an exercise physiologist who was once described by Runner’s World magazine as “the world’s best running coach,” died on Sept. 12 at his home in Cortland, N.Y. He was 92.
His death was confirmed by his wife, Nancy Daniels.
Over seven decades, Daniels, armed with a Ph.D. in the subject, researched the physiology of running and coached Olympians and elite college athletes, as well as recreational runners. Perhaps his greatest contribution was to simplify and make accessible to coaches and runners of all levels — from the high school history teacher who doubles as a track coach to the world-class marathoner — the complicated science of human performance.