This week’s Olympic Marathon Trials will feature more than just professional runners toeing the line. There will also be parents, teachers, doctors, dieticians—and lawyers.

More than 700 of the country’s fastest marathoners have converged on Atlanta, where they will battle through 26.2 miles for a chance to compete in this summer’s Tokyo Olympics. But just qualifying to run in the Feb. 29 trials is an impressive accomplishment. Men and women need to cover the distance in two hours and 19 minutes or two hours and 45 minutes, respectively.