Is it really that impressive that triathletes develop superior stamina through multi-sport training, or are they just spreading themselves too thin by trying to master three disciplines at once? It seems counterintuitive that being a jack-of-all-trades would somehow grant an athlete an edge in endurance over someone who focuses solely on one sport. Do the marginal gains from cross-training really outweigh the potential drawbacks of diluted focus and increased risk of injury? Are triathletes truly building superior stamina, or are they just burning out faster and relying on their bodies ability to recover from one discipline to another? Whats the scientific basis for the idea that multi-sport training leads to increased stamina, and are there any studies that actually support this claim? Its easy to attribute a triathletes success to their multi-sport training, but how do we know thats not just a correlation rather than causation?