Fitness Business Young People Are Driving a Surge in Triathlon Sign-Ups Courtney Rehfeldt Published: December 16, 2025 Share on Facebook Share on Twitter Share via Email credit: Ironman Group Ironman Participation among athletes under 30 grew 35% this year, while the 30–34 age group remained the largest category for the second consecutive season Ironman’s… Membership Required This article is for ATN Pro members only. Subscribe Now Already a member? Log in Already a member? Log in here Tags:ATN Pro Data Gen Z in-person events Ironman women