Olav Aleksander Bu is the Norwegian performance coach behind triathlon's most dominant duo — two-time Ironman world champion Kristian Blummenfelt and 2022 Ironman world champion Gustav Iden. Trained as an engineer before moving full- time into endurance coaching, Bu built the in-house physiology lab and testing protocols that underpin the Norwegian method, and now consults across cycling, running and Olympic sport. His work fuses high-volume aerobic training with frequent lab-grade physiological monitoring.
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