JOHANNES HØSFLOT KLÆBO is the most decorated cross-country skier in history. Just check out his VO2 max , which was last measured around 85. explains that most of the world class athletes that played in the 2026 FIFA World Cup have a VO2 max in the 70s. Of course, Klæbo emphasizes in the latest Strong Talk episode that his goal isn’t to build a strong VO2 max—it’s to win races. Want more deep-dive fitness wisdom from Samuel and other celebs and experts who've been on our Strong Talk podcast?