By Vijay Kumar Malesu Reviewed by Susha Cheriyedath, M.Sc. May 26 2026 A worldwide race-record analysis reveals how sex, age, nationality, and distance combine to shape endurance running, from 5 km speed to marathon dominance. Download your PDF copy by clicking here. Study: The association between nationality, gender, age and running performance in endurance runners: an empirical analysis of worldwide multi-distance race data from 1999 to 2024 . Image Credit: kovop / Shutterstock In a recent