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Hal Higdon Has Trained Millions of Runners. At 90, He's Not Slowing Down. - The New York Times
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Marathon, Revised and Updated 5th Edition: The Ultimate Training Guide: Advice, Plans, and Programs for Half and Full Marathons: Higdon, Hal: 9780593137734: Amazon.com: Books
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Hal Higdon's 30-week Training Schedule for a Marathon | Marathon training plan, Marathon training, Marathon training schedule
