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What are hypotonic drinks?
Hypotonic drinks are solutions designed to quickly rehydrate the body after intense physical activity, such as running or trail running . These drinks contain a lower concentration of solutes (primarily carbohydrates and electrolytes) than body fluids, allowing them to be absorbed quickly by the body for efficient hydration.
Key features of hypotonic drinks:
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Rapid absorption: Since the concentration of solutes in hypotonic drinks is lower than that of the body, they are rapidly absorbed in the digestive tract, facilitating instant rehydration during or after exercise.
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Efficient hydration: These drinks are formulated to quickly replace the water and electrolytes lost through sweat during exercise. Electrolytes such as sodium, potassium, magnesium, and calcium are essential for maintaining fluid balance and preventing dehydration and muscle cramps.
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Low in carbohydrates: Hypotonic drinks typically have a lower concentration of carbohydrates compared to isotonic or hypertonic drinks, meaning they are more suitable for situations where rapid hydration without excessive energy intake is the priority.
Why are they useful for running and trail running?
- Rapid recovery: They're ideal when you need a quick replenishment of fluids and electrolytes, such as during long workouts or competitions. They help restore fluid balance without overloading the body with too much sugar.
- Low- to moderate-intensity activities: These are perfect for short workouts or when energy needs are not as high, but effective hydration is required.
Hypotonic drinks are, therefore, an excellent option for maintaining adequate hydration and avoiding fatigue and cramps during prolonged running and trail running efforts, especially when the priority is fluid replacement rather than energy.

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