Are Triathletes the Fittest Athletes? The Science Explained

The question of which athletes are the fittest is one of the most debated in sports science — and for good reason. The answer changes depending entirely on how fitness is defined. If fitness means peak aerobic capacity (VO2max), cross-country skiers hold the record. If fitness means multi-discipline endurance across three sports simultaneously, Ironman triathletes make the strongest case. If…