AHMED, qahar. The effect of fartlek training in developing transition speed and specific speed endurance and 400m running achievement. Zanco Journal of Physical Education and Sport Sciences, [S. l.], v. 3, n. 1, p. 1–10, 2026. DOI: 10.21271/ZJPESS.3.1.1. Disponível em: https://zancojournal.su.edu.krd/index.php/ZJPESS/article/view/5164. Acesso em: 30 apr. 2026.