How to replenish water scientifically during exercise? Avoid the risk of dehydration by following these principles

Hydration during exercise is key to maintaining physical fitness and health, but it needs to be flexibly adjusted according to exercise intensity, duration and environment. The main content is divided into three parts:Time to replenish water(Before, during and after exercise),Amount and frequency of hydration(A small amount and multiple times is the principle),Liquid selection(water or electrolyte drink). During high-intensity exercise or high-temperature environments, you need to pay extra attention to electrolyte balance. For ordinary aerobic exercise, pure water should be used. Avoid drinking too much water at one time to prevent stomach upset or hyponatremia.

Before exercise: reserve water in advance

You should drink 400-600 ml of water in batches 2 hours before exercise to allow metabolism time for the body to store water. If you exercise for more than an hour, you can replenish sodium-containing electrolyte drinks (such as Gatorade, Pocari Sweat) in advance to avoid rapid loss of electrolytes after sweating. The American College of Sports Medicine (ACSM) recommends that light yellow urine before exercise indicates adequate hydration, while dark yellow urine requires timely rehydration.

During exercise: take a small amount of supplement regularly

Add 150-200 ml of water every 15-20 minutes. For high-intensity exercise (such as marathon), you can switch to an electrolyte drink containing 6%-8% carbohydrates. In high temperature environments, the amount of water replenished should not exceed 1 liter per hour to avoid blood dilution. Research shows that when water loss reaches 2% of body weight, exercise performance declines. The amount of water required can be calculated by weighing before and after exercise (1.5 liters of water for every 1 kilogram of body weight lost).

Post-exercise: Gradually restore balance

Replenish 150% of the water lost within 2 hours after exercise (for example, you need to drink 1.5 liters for 1 liter of sweating), and consume sodium-containing foods (such as bananas and nuts) to help water retention. After long-term exercise, it is recommended to drink professional recovery drinks (such as Muscle Technology Recover-X), whose sugar-sodium ratio is more suitable for needs. Avoid alcoholic or caffeinated drinks, which can worsen dehydration.

Summary: Personalized Hydration Solution

Hydration needs to be adjusted based on the type of exercise, personal sweat rate and environment. An average bodybuilder needs 500ml of water per hour, while a triathlete may need more than 1 liter per hour. When choosing a drink,<1小时运动选水，>Choose products containing electrolytes for 1 hour. Pay attention to urine color and thirst. Scientific hydration can improve sports performance and ensure safety.

Quote sources:
1. American College of Sports Medicine (ACSM) "Guidelines for Exercise Hydration"
2. "Sports Nutrition Practice Manual" by the Chinese Nutrition Society
3. Product data comes from the 2023 nutrition facts table on each brand’s official website.