Zingg MA, Rust CA, Rosemann T, Lepers R, Knechtle B. Runners in their forties dominate ultra-marathons from 50 to 3,100 miles. Clinics [Internet]. 2014 Mar. 1 [cited 2025 Mar. 14];69(3):203-11. Available from: https://revistas.usp.br/clinics/article/view/77113