How to Help the Body in the Heat: The Myth of 8 Glasses
USEFUL | ORIENT. With the onset of peak summer temperatures, our body goes into high-stress mode. We often feel lethargy, headache, or heaviness, attributing it to the banal "steamed up in the sun." However, in most cases, the reason lies in subtle biochemical processes associated with the loss of moisture and minerals.
From the point of view of physiology, we understand how much water you really need to drink, why iced tea does not save you from thirst, and how to prepare the perfect restorative drink right in your kitchen, relying on the advice of reputable nutritionists and the recommendations of experts from the World Health Organization on replenishing electrolytes in the heat.
The Myth of "8 Glasses" and the Real Math of Hydration
The idea that everyone should drink strictly 2 liters (or 8 glasses) of clean water a day is one of the most persistent marketing myths of the 20th century. This figure first appeared in the recommendations of the American National Research Council back in 1945, but with an important caveat that was eventually "forgotten": most of this norm is already contained in the food we eat.
There is no universal norm in real life. The need for liquid depends on weight, activity level, humidity and temperature outside the window.
A simple formula for summer: In the basic regime, the body needs about 30-35 ml of water per 1 kg of body weight. With high air temperature and active sweating, this figure increases to 40-45 ml/kg.
Quick self-test: Do you have enough water? It is not necessary to keep complex accounting diaries. There is a sure indicator — the color of urine. Straw yellow or light lemon: the perfect balance. Dark amber: a clear signal that the body is experiencing fluid deficiency and is working in economy mode.
Why Is It not Enough to Just Drink Water in the Heat?
When we are hot, the body triggers a natural cooling mechanism — sweating. But along with water through the pores of the skin, we lose key electrolytes: sodium, potassium, magnesium and chlorine.
Electrolytes are mineral salts that conduct electrical impulses in our body. They are responsible for muscle contraction, heart rhythm, brain function, and maintaining pressure in cells.
If you drink only ordinary purified water in large volumes in extreme heat, the effect of "leaching" occurs: the concentration of salts in the blood drops even more. As a result, typical summer symptoms occur: Muscle cramps and tics; Background headache in the evening; Severe fatigue during normal sleep.
The Three Main Misconceptions about Summer Drinks
Ice water cools faster
In fact: Icy liquid causes spasm of the vessels of the stomach and esophagus. The body spends additional energy to warm the incoming water to body temperature (36.6 ° C), and only then begins to absorb it. In the heat, water at room temperature or barely warm is best absorbed.
Cold sweet tea and soda quench thirst
In fact: Drinks with a high sugar content create the opposite effect. The high concentration of glucose causes the cells to release their own water to dilute the sugar in the stomach. As a result, thirst returns after 10-15 minutes.
Coffee is forbidden in the heat
In fact: Caffeine does have a mild diuretic effect, but for people who are used to coffee, it is minimal. The main rule is to wash down every cup of espresso or Turkish coffee with a full glass of clean water.
Home Isotonic: Restoring Balance in 2 Minutes
An isotonic is a solution whose osmotic pressure is close to that of blood plasma. It is absorbed many times faster than regular water and immediately replenishes lost minerals.
Making the right drink at home is very simple.
Basic Recipe for Homemade Electrolyte:
Pure water (1 liter) is the basis of hydration;
Freshly squeezed lemon or lime juice (3-4 tablespoons) is a source of potassium, vitamin C and pleasant freshness.;
Honey or natural juice (1-2 tablespoons) — fast carbohydrates necessary for proper sodium absorption;
Sea salt (1/4 teaspoon) is a source of sodium and chlorine for water-salt balance.
Drink this drink in small sips of 100-150 ml throughout the day, especially while walking or working outdoors.
4 Golden Rules of Hydration for Every Day
Drink ahead of time. The feeling of thirst is not the first signal, but the "emergency siren" of the brain when moisture deficiency has already reached 1-2% of body weight. Drink 2-3 sips every 20-30 minutes.
Add a pinch of salt to your morning glass. A small pinch of unrefined salt in a glass of warm water in the morning helps to retain moisture in the tissues throughout the day.
Eat watery vegetables and fruits. Cucumbers (96% water), watermelons (92%), zucchini and tomatoes contain structured water rich in natural minerals and fiber.
Keep an eye on the room temperature of the drink. Keep a carafe of water on the table, not in the refrigerator. Understanding simple physiological processes helps you endure even the hottest summer with high productivity, good health and a great mood.
The material is based on clinical guidelines on the prevention of dehydration and water-salt balance of the World Health Organization (WHO) and research from the National Library of Medicine of the USA (NCBI).
