52 years ago, Jim Ryun accomplished another first: he ran under 4 minutes in a high school only competition. That high school competition was the Kansas State High School Track and Field Championships and his winning time was 3:58.3.
He led every step of the way.
What a lot of people don't remember is that he split two 21.9 220s on his spring medley that weekend as well, one in the prelims on Friday and one in the final on Saturday AFTER his 3:58.3.
Speed is essential to running under 4 minutes and Jim Ryun proved he had plenty of it.