Wonderful summer, the heat and the sun. Drink more water in hot weather. But if it becomes really hot, as is the case in some southern countries, it is important to keep the head and body cool. Drinking water in great heat.
One and a half liters of fluid a day is the advice. That may be tea, coffee, milk or soft drinks, but if it is hot and you lose a lot of moisture, water is best to keep the moisture content of your body up to standard. But pay attention: over the years the thirst stimulus is less strong. This way you do not notice that you drink too little, so you run the risk of drying out. The symptoms are confusion, dizziness, less supple skin and a dry tongue. Dehydration increases the risk of infections and kidney stones and can also cause thrombosis. In short: if the temperatures rise, you have to drink, even if you are not thirsty. Those who use water tablets, for example for blood pressure, have an increased risk of dehydration on tropical days. People who take antidepressants often perspire more and therefore need to drink more. And finally: people with kidney problems and diabetes also suffer from dehydration. Bottled water, Tap water or Filtered water.
Note: if you suffer from kidney problems or heart failure, you usually can not drink unlimited and it is wise to ask your doctor what to do and leave in extremely hot weather.
To prevent the body from getting too hot, we perspire. The layer of moisture on the skin evaporates and therefore we cool down. When we sweat, fluid and electrolytes are lost. These are minerals, such as sodium, potassium, calcium, magnesium and chlorine, which have important functions in the body. If we sweat a lot, we have to supplement those minerals and that requires more than just drinking water. Drinking water prevents muscle pain. Watermelon, mango, strawberries, raspberries and blueberries contain not only sugars and vitamins, but also many minerals. Good heat food! Vegetables also contain minerals and especially cucumber is therefore a great thirst quencher. You can supplement a deficiency of sodium (salt) with broth, tomato juice or a sports drink that contains minerals.
Cold water drinking. Cold drinks and ice cubes are counterproductive in heat. They ensure that the body temperature drops, but that is only for a moment. Our internal thermostat immediately sends a signal through the cold to raise the body temperature. As a result, we eventually only get warmer. It is better to drink (lukewarm) hot drinks. This makes the body temperature a bit higher, but our body responds precisely by lowering the thermostat.
Because the ice-cold outside air has to be heated to room temperature, the air in an aircraft is extremely dry. The air humidity is on average less than 10 percent, while normally it is usually around 75 percent. Because of that low humidity you can feel weak and exhausted, and that is even harder when it is very hot in the country you are going to. That is why it is good not to drink a lot of water during, but also before and after the flight. With the bonus that the effect of jet lag is softened.