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This article explores why physically fit individuals tend to sweat more, explaining how increased sweat is a sign of improved cardiovascular efficiency and heat regulation. It breaks down how VO₂ max relates to fitness, how sweat rates vary based on different factors, and what essential electrolytes are lost through sweat. The piece emphasizes the importance of replenishing both fluids and electrolytes—especially for active people—and promotes smarter hydration strategies to support performance and recovery.