How often should an individual drink water during exercise for optimal hydration?

Drinking water every 15 minutes during exercise is generally considered optimal for hydration, especially for activities that last longer than 30 minutes or occur in hot and humid conditions. This frequency helps maintain fluid balance, ensuring that the body can regulate temperature and sustain performance. When individuals exercise, they lose fluids through sweat and respiration, so regular intake of water can replenish these lost fluids before dehydration sets in.

The 15-minute interval allows enough time for water to be ingested and potentially absorbed, keeping the athlete hydrated without overwhelming the stomach. This approach is especially vital during endurance sports when electrolyte balance and hydration are crucial for prolonged performance.

In contrast, other intervals may not provide sufficient hydration for longer exercises or could lead to discomfort if too much water is consumed in a short period. The other choices suggest intervals that might not align with standard hydration principles for maintaining optimal performance and physiological function during physical activity.