Why drink water during exercise?
Show answer & explanation
Answer: Replaces sweat fluid loss
Cools internal organs — Wrong. Water helps thermoregulation through sweat evaporation, but main issue is fluid replacement—maintaining blood volume and body function.
Flushes out toxins — Wrong. The detox myth is false. Water doesn't 'flush toxins'—kidneys do that. Exercise hydration is about replacing sweat loss maintaining blood volume/temperature.
Replaces sweat fluid loss ✓ — Correct! Fluid replacement! Exercise generates heat—body sweats to cool (evaporation). Lose 1-2 liters/hour intense exercise! Dehydration: (1) Decreased blood volume—heart works harder. (2) Reduced sweat production—overheating risk. (3) Impaired performance—2% dehydration reduces endurance ~10-20%. (4) Dizziness, nausea. Drink before thirsty—thirst lags dehydration. Electrolytes (sodium, potassium) also lost in sweat—sports drinks for >1 hour exercise. Urine color indicator: pale yellow = hydrated!