Ironman Enforces New Shoe Regulations for 2025 Season
- Diego Tobias
- Feb 28, 2025
- 2 min read
In a significant move to maintain fair competition, Ironman has released a list of prohibited running shoes for the 2025 season. This action aligns with World Athletics' regulations, focusing on limiting technological advantages that certain footwear may provide.
Understanding the Prohibited Footwear
The banned list, effective as of February 6, 2025, includes popular models from major brands:
Adidas: Adizero Prime X, Adizero Prime X Strung, Adizero Prime X2 Strung
Asics: Superblast, Novablast 4, Novablast 5
Hoka: Skyward X
New Balance: FuelCell SuperComp Trainer
Puma: MagMax Nitro
Saucony: Kinvara Pro
These models exceed the 40mm stack height limit set by World Athletics, with some shoes reaching up to 50mm. Stack height refers to the total thickness of the shoe's midsole, measured from the ground to the insole, encompassing all cushioning materials and embedded technologies. Higher stack heights have been associated with enhanced energy return, potentially offering runners a performance edge.
Rationale Behind the Ban
The decision to prohibit these shoes stems from a commitment to uphold the integrity of the sport. Research indicates that increased midsole thickness can significantly improve running efficiency, leading to faster times not solely attributed to an athlete's conditioning but also to technological enhancements. By enforcing these regulations, Ironman aims to ensure that race outcomes are determined by athletes' abilities rather than equipment advantages.
Ironman Head Referee Jimmy Riccitello emphasized the importance of clarity for participants:
"Because there are only a few shoes that are currently prohibited, we felt a list of prohibited shoes would be helpful to athletes."
Implications for Athletes
All competitors, including age-group participants, are subject to these regulations. Random shoe inspections may occur before, during, or after events. Athletes found wearing non-compliant footwear risk disqualification. Riccitello noted:
"At an event, referees do not inspect shoes or go looking for prohibited shoes. However, if evidence is provided that an illegal shoe may have been used, a head referee will investigate."
To assist athletes in selecting appropriate footwear, Ironman refers participants to the World Athletics' list of approved shoes. It's advisable for athletes to verify their shoe choices against this list well in advance of competition.
Looking Ahead
As the 2025 season progresses, the list of prohibited shoes may evolve with the introduction of new models. Athletes and coaches should stay informed about any updates to ensure compliance. This proactive approach by Ironman underscores its dedication to fair play and the true spirit of athletic competition.
For the most current information on equipment regulations and prohibited footwear, athletes are encouraged to consult the official Ironman competition rules and the World Athletics' approved shoe list.
Comments