Professional athletes face a growing privacy threat from wearables. Fitness trackers and smartwatches generate detailed biometric data—sleep patterns, heart rates, movement records. According to security expert Bruce Schneier, the problem is that coaches now have access to this information. Picture this: a basketball player has a terrible game. The coach wonders whether they showed up hungover. They check the athlete's wearable data—when did they sleep, what was their heart rate overnight? It's a natural coaching question, but it crosses a critical line. An athlete's livelihood depends entirely on performance and mutual trust with their team. Surveillance through wearables corrodes both. More broadly, this isn't just about whether coaches should have this access—they shouldn't—but whether teams and players have actually agreed on data boundaries. Right now, most haven't. That's the privacy crisis.

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