What is a semi-professional runner?

A semi-professional runner is a runner that is competitive enough to earn a partial income from running, whether that is through small sponsorships or prize money, but does not make enough to support themselves without another source of income.

Running Research: A Multi-Year Study of World-Class Training Logs

Best Training for Marathon

A 2019 study published in the Journal of Strength and Conditioning Research by Casado, Hanley, Santos-Concejero, and Ruiz (2019) studied the training logs of world and national class runners and determined that the amount of total mileage, easy runs, and tempos were the best predictors of athletes’ race performances during the first seven years of their careers.