Hal Higdon Has Trained Millions of Runners. At 90, He’s Not Slowing Down.Hal Higdon Has Trained Millions of Runners. At 90, He’s Not Slowing Down.
https://www.nytimes.com/2021/07/18/sports/how-to-run-hal-higdon-tips-training.html
https://www.nytimes.com/2021/07/18/sports/how-to-run-hal-higdon-tips-training.html