Do you remember Kristian Blummenfelt? The Norwegian—Olympic triathlon champion—made headlines not that long ago when he talked about wanting to win the Tour de France in 2028, only to later walk that back. In 2026, he has caused a stir again on social media by sharing what he claims is his VO2 max.
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Blummenfelt posted an Instagram “dump” showing a screen that appeared to list a VO2 max of 101.1 mL/kg/min. If accurate, that would be an extraordinary number: the previously reported highest VO2 max measurement—often linked to Norwegian rider Oskar Svendsen—sat in the high 90s. In any case, the post immediately prompted the usual debate about testing protocols, calibration, and how comparable such lab numbers really are.
Continue reading below the photo/video!
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Head of Performance UAE shakes head
For clarity: VO2 max is a measure of aerobic capacity—how much oxygen (in millilitres) your body can take in, transport and use per minute per kilogram of bodyweight during intense exercise.
Jeroen Swart, Head of Performance at UAE Emirates-XRG, saw Blummenfelt’s post and clearly didn’t buy it. On X, he suggested someone should “go to Norway and teach the physiologists how to calibrate a metabolic cart.”
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Swart added that, in his view, questionable VO2 data seems to reappear every couple of years, with wildly unrealistic values and sensational stories about superhuman endurance athletes—something he claimed “only ever happens in Norway”, calling the whole thing bizarre.
He also publicly invited Blummenfelt to come to one of the labs connected to his performance network to be tested properly, even saying he would be willing to do it free of charge as a public service.
Read on below the tweet!
Why didn’t Blummenfelt become a cyclist after all?
Blummenfelt has already made a splash in the cycling world, when he said he wanted to chase Tour de France success. The 31-year-old Norwegian later returned to that topic after failing to hit his goal of Olympic gold in Paris, choosing to remain focused on triathlon rather than making a full switch to road racing.
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“If I had performed well in Paris, then I think I would have been a road cyclist now.” He stressed he does not want to be afraid of challenges, but that he wants to finish his triathlon career properly first—pointing out that the timing window for a serious cycling switch felt like “now or never”, with Los Angeles 2028 also on the horizon.
Tom van der Salm (27) comes from the charming town of Zeilberg (Deurne) in the Netherlands and has been working as editor-in-chief & journalist at IDL Pro Cycling's parent site, In de Leiderstrui, since 2019. He travels with the peloton from the Tour de France to the AlUla Tour and from the World Championships in Rwanda or Canada to the Zilvermeercross in Mol. In his spare time he enjoys playing football, mountain biking, running, walking with his Labrador/Stabyhoun, investing, holidays, (specialty) beers, reading, cooking and watching sports & documentaries!
Paging @kristianblu please come and visit one of our @science2sport labs and we will test you accurately. We will even do it for free as a public service.
Jeroen Swart
@JeroenSwart
Can someone please go to Norway and teach the physiologists how to calibrate a metabolic cart. Seems we get dodgy VO2 data every second year with wildly inaccurate values and sensational stories about incredible endurance athletes. Only ever happens in Norway. Bizarre.