Lifetime marathoner (111 total), contributing editor Runner's World, & best-selling author. Creator of time-tested, training plans for runners of all levels.
In your first marathon, you always set a PR (Personal Record). That's automatic! Moving forward, you need to work harder to equal that achievement in marathons 2, 3 & beyond. #RunWithHal
Finding your best mileage level is tricky and may take years, but once you reach a comfortable level, you can reap the benefits of success. #RunWithHal