“When Swedish physiologists went to observe and analyze the training methods of the Kenyan runners,” Lydiard wrote, “they found that high school girls and boys were running on average about twelve or thirteen miles daily to and from school. Whereas the Africans would be running leisurely, trotting to and from school, their counterparts in the U.S. would be mostly on the track doing hard anaerobic repetitions. This is where the real problem lies.”