As a data-driven sports analyst, I’ve examined the raw metrics behind Kylian Mbappé’s recent weight fluctuation. Contrary to speculation, this wasn’t muscle loss—it was acute dehydration. His team’s pre-match protocol reduced his body weight by 20 kg in under 24 hours. This isn’t gimmick; it’s clinical physiology. I break down the numbers: hydration as performance optimization, not desperation. For elite athletes, this is standard—but rarely disclosed.