Running Legends

The greatest marathon runner of all time, the first human to break the 2-hour marathon barrier, and a double Olympic champion.

A pioneering exercise physiologist and epidemiologist, best known for developing the Karvonen Formula which revolutionized heart rate training and for his work on the North Karelia Project.

A research engineer and long-distance runner who developed the Riegel Formula (t2 = t1 * (d2 / d1)^1.06), the industry standard for race time prediction.