Extreme heat is hard on the body. As the temperature increases, the body must cool itself by sweating, which causes continuous fluid and mineral loss. Nutrients, in this case, act as a support system, not only for energy but for fluid balance, organ function, and body stability.
Hydration is more than just water
Sweating accelerates the loss of fluid in hot weather. Dehydration can arise from this exceeding fluid uptake, which strains the muscles and brain.
The primary fluid still needed is water. Water still remains the first requirement. However, water requirements increase in hot weather, and thirst may not be a good indicator since thirst is an indication of dehydration. Regularly taking small amounts of fluids during the course of the day can keep dehydration at bay. Pale-colored urine is considered a good indicator of proper hydration.
Electrolytes: The missing piece
Sweat not only evaporates water; it also evaporates minerals such as sodium, potassium, and magnesium. These minerals are vital in the functioning of the nervous system, muscles, and the regulation of water in the body.
In situations where the body is exposed to heat or excessive sweating, water might not be enough. The body will need these minerals to counter the effects of fatigue, dizziness, muscle spasms, or headaches. Easily accessible foodstuffs may be employed as a source of minerals.
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Lightly salted foodstuffs, fruits, or even conventional drinks like buttermilk or tender coconut water may be consumed in moderation.
Food as a source of hydration
Hydration is not limited to fluids. Foods play an important role in the daily hydration of the human body. Fruits like watermelon, oranges, and cucumbers contain large amounts of water. They provide the human body with the required vitamins and minerals.
This has the advantage of providing the human body with hydration and nutrition simultaneously without putting it in further stress. Light meals are advisable in hot weather since heavy meals can cause the metabolic heat to rise.
Energy and salt balance
The body needs to have energy during these extreme heat conditions, while the digestive processes are slowed down. The body can have constant energy through meals taken throughout the day since they do not stress the body. Another factor in this regard is the quantity of salt. While it is generally advisable to avoid consuming excessive amounts of salt, periods of intense perspiration may necessitate an increase in salt intake.
Although extreme heat does not require major changes in dietary habits, it does require a more careful approach in terms of hydration and nutrition. Water is still at the center, and then there are electrolyte-containing beverages and foods, if needed.
The human body adjusts itself in a very efficient manner if it is provided with constant levels of hydration, minerals, and light meals. In extreme heat, nutrition does not just serve as a source of energy but also as a protective agent against the effects of extreme heat.
(The author is a nutritionist at Apollo Spectra Hospitals, Chennai)
The opinions expressed in this article are those of the author and do not purport to reflect the opinions or views of THE WEEK.