1. Prevent Dehydration and Avoid Your Body “Shutting Down”

·Sweating during exercise rapidly depletes fluids (potentially 0.5-2 liters per hour), leading to thicker blood, increased heart rate, and in severe cases, dizziness, fatigue, or even heatstroke.

·Dehydration exceeding 2% of body weight significantly impacts athletic performance (e.g., reduced strength, diminished endurance).

2. Restore Muscle Function and Reduce Soreness

·Muscle contraction relies on water to transport nutrients and remove metabolic waste. Dehydration causes muscle stiffness and cramps, prolonging recovery time.

·Hydration accelerates lactic acid metabolism, alleviating post-exercise muscle soreness.

3. Regulate body temperature and prevent overheating

·During exercise, elevated body temperature is cooled through perspiration (each liter of evaporated sweat dissipates approximately 580 kcal).

·Insufficient hydration reduces sweat production, potentially causing dangerous spikes in body temperature (e.g., heatstroke).

4. Replenish electrolytes to maintain internal balance

·Sweat contains electrolytes like sodium and potassium, which must be replenished after heavy perspiration (otherwise hyponatremia may occur, causing nausea and convulsions).

·Electrolytes help sustain nerve transmission, muscle contraction, and cardiac rhythm.