Kristian Blummenfelt Appears to Have Recorded the Highest VO2 Max Ever
What appears to be the first-ever triple-digit VO2 max underscores the physiological engine behind one of triathlon's most dominant careers.
Ironman
Kristian Blummenfelt has posted on Instagram what appears to be the highest VO2 max ever recorded under controlled laboratory testing.
The Norwegian shared results showing a VO2 max of 101.1 ml/kg/min, surpassing the previous benchmark of 97.5 ml/kg/min set by fellow Norwegian endurance athlete Oskar Svendsen.
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Why VO2 Max Matters
VO2 max reflects an athlete’s maximal aerobic capacity and is strongly correlated with endurance performance, especially at shorter distances. While long-course racing places greater emphasis on durability, efficiency, and the ability to sustain a high percentage of aerobic capacity for extended periods, an exceptional VO2 max still provides a powerful physiological ceiling.
Blummenfelt’s recent race results reinforce that point. He was deeply involved in the battle at the 2025 Ironman World Championship in Nice, ultimately finishing third after late-race leg cramps on the run, and followed that with a runner-up finish at the 2025 Ironman 70.3 World Championships in Marbella, losing in a dramatic sprint finish to Jelle Geens.
With his physiological ceiling now pushed even higher, it will be exciting to see how Blummenfelt converts it into world-class performances in 2026.