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30 Jul 2015

What you might not know about summer hydration

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July 30, 2015 Category: Health Posted by:

BPT

Summer is the time for outdoor fun and activities, but as temperatures rise, staying properly hydrated becomes even more important. Even if you are not engaged in strenuous activity, you will sweat more in the heat and humidity. Even mild activity will increase your body temperature and your body’s need to sweat.

This is especially the case for anyone participating in any sort of exercise program. Our bodies produce sweat in order to regulate our core body temperature. As the moisture that appears on your skin evaporates, you cool off. Sweating is more efficient in dry conditions than areas with high humidity. In fact, human beings are the most effective mammal when it comes to regulating our body temperature. At the extreme, an adult can sweat as much as two to four liters per hour.

All of this water needs to be replaced, but remember that when you sweat, you are not just losing water, you are losing minerals such as sodium and potassium which also need to be replaced. This is why athletes and runners drink sports drinks like Gatorade rather than just water. Replacing water without sufficient sodium can quickly produce hyponatremia, a potentially fatal condition.

Hyponatremia symptoms

Hyponatremia symptoms are similar to those of heat exhaustion and heat stroke and are often overlooked. Sometimes people drink more water when they start having these symptoms and end up making their condition worse. Symptoms range from mild to severe and can include nausea, muscle cramps, disorientation, confusion, seizures, coma and death. To avoid this condition, medical experts advise marathon runners to consume extra salt. This advice should also be considered by anyone exposed to excessive heat. Salt is critical in maintaining hydration.

Risk factors

There have been several cases of illness and even deaths from hyponatremia over the past several years. According to the British Medical Journal, 16 runners have died as a result of too little sodium and over-hydration, while another 1,600 have become seriously ill. It is true that water intoxication is more commonly seen among extreme athletes, but older individuals are also at high risk for several reasons.

As we age, our kidneys become less efficient at conserving salt when the body is stressed and common medications such as diuretics greatly increase that risk. That’s one of the reasons that during severe high temperatures, news stories most often refer to elderly victims of the heat.

Finding a balance

The proper balance of electrolytes in the human body is essential for normal function of the cells and organs. Electrolytes help to regulate cardiovascular and neurological functions, fluid balance and oxygen delivery.

Ideally, anyone engaging in outdoor activity in the heat or even an indoor exercise program should drink eight to 12 ounces of fluid every 15 to 20 minutes during a session. If exercising exceeds an hour, a beverage that contains salt and an energy carbohydrate is far superior to plain water. The recommended concentration of salt in a fluid replacement beverage is a quarter teaspoon per liter. Most sports drinks contain salt, although the amount is not quite that high. Anyone can make an alternative to commercial fluid replacement beverages easily by adding a quarter to a half teaspoon of salt per liter or 32 ounces of water.

Every day, more and more Americans are motivated to start exercise programs. Physical fitness is a state of good health resulting from regular exercise and good nutrition. When you exercise, your body’s metabolism works at a much higher rate, breaking down and regenerating tissues and creating waste metabolites that need to be flushed out of your system. However, regardless of your level of activity, you still need to maintain good hydration. So remember to always drink plenty of water to beat the heat, but also up your intake of electrolytes, particularly sodium and potassium.

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