For decades, elite sport has been built on a simple equation: Endure more, sacrifice more and win more. But that model is beginning to crack. A growing number of athletes, researchers and governing bodies around the globe are rethinking what success in sport means, and questioning whether a system that produces medals at the expense of mental health can last. The answer lies in confronting what they describe as a largely overlooked issue -- "sports trauma," according to Kim Bui, a retired German