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1. Increase the burden on the heart. The heart is like a pump, when the human body is dehydrated, the heart becomes a leaky pump, and the amount of blood pumped out by the heart every time it contracts is very small, in order to meet the needs of the exercise body, the heart has to speed up the contraction;
2. The heat generated when the muscles contract cannot be dissipated and accumulates in the body, so that the body temperature rises;
3. Insufficient oxygen and nutrients required by muscles;
4. The excretion of metabolic waste products of the body is blocked. These hazards caused by dehydration eventually lead to the early onset of fatigue during exercise, the decline of exercise capacity and the difficulty of eliminating fatigue after exercise. This will seriously reduce the effectiveness of athletes' training, and also make fitness exercises fail to achieve fitness goals and even harm health.
For a person weighing 50 kg, dehydration of 1 kg will cause thirst; Dehydration 2 pounds, severe thirst, discomfort, depression and loss of appetite; Dehydration of 3 catties will cause hemoconcentration, oliguria, and dry mouth; Dehydration of 4 pounds will cause decreased physical fitness, redness, irritability, drowsiness, apathy, nausea and emotional instability; Dehydrated 5 pounds will not be able to concentrate; Dehydration of 6 pounds will impairs the ability to regulate body temperature during exercise, and the heartbeat and breathing will be accelerated; Dehydration of 8 pounds will cause dizziness, bruising, slurred speech, weakness and mental disorders; Dehydration of 10 pounds will cause muscle cramps, inability to balance after closing eyes, decreased general ability, confusion, insomnia and swollen tongue; Died of dehydration at 15 pounds. It seems that we should not underestimate the harm of dehydration to the human body.
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**Dryness, loss of elasticity, acidosis, electrolyte imbalances, death from heartbeat and respiratory failure.
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1. Weight gain. When water is not sufficient, the body conserves every drop of water to prevent severe dehydration, resulting in water retention and temporary weight gain.
2。Decreased energy. Even mild dehydration can significantly deplete energy, so when you're feeling groggy, don't just drink coffee to refresh yourself, it may be better to drink some water.
3. Decreased concentration. The brain is made up of 80% water, so the brain's cognitive function is heavily dependent on water. Mild dehydration can also lead to a decrease in creative thinking. British researchers have found that drinking more water can increase the flexibility of mental function by 14%.
4. Cranky. Researchers at the University of Connecticut in the United States asked male and female participants to undergo a series of cognitive function tests, and found that mild dehydration can affect people's mood, make people cranky, cause fatigue and headaches.
5. Feeling hungry. Hunger and dehydration can be easily confused. If your tummy rumbles, it's best to drink some water first and see if you really want to eat those tempting snacks after 20 minutes.
6. Headache. When you have an unbearable headache and want to take painkillers, you may want to drink some water first, as dehydration can also cause headaches.
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1. Cause venous thrombosis.
Once the human body is dehydrated, the plasma volume will decrease, the blood osmotic pressure will rise, and the blood viscosity will increase, which can easily cause venous thrombosis.
2. Cause ear stroke.
If you don't pay attention to drinking water after exercise or being in a state of dehydration when working, the blood flow will slow down, and it is easy to form blood clots, block blood vessels, cause poor information in the nervous system, and the consequence is sudden deafness.
Some people are often inactive, suddenly exercise a lot, do not pay attention to timely hydration, and some people work in a high temperature environment, sweat a lot and forget to hydrate, which are all high-risk groups of "ear stroke".
3. Cause back pain and joint pain.
Thirst occurs when water is lost2 body weight, and the normal functioning of physiological functions is affected at this time. For people who are susceptible to dehydration, infants, the elderly and office workers, they are more likely to have back pain when they are dehydrated, chronic fatigue syndrome, headaches, migraines, rheumatoid arthritis pain, neck pain, muscle pain, joint pain, etc.
4. Accelerate aging.
The decrease in water content in the body can easily cause water imbalance in the body, which is an important cause of aging.
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After the lack of water, our human body will feel headache, and will feel dry, joint stiffness, poor bowel movements, and sometimes the urine will turn yellow, will be particularly thirsty, and the lips will be particularly dry.
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First of all, your head will hurt often, and you will often faint, ** very dry, and there is a lot of skin, the joints will be very stiff, and you will be constipated, the urine will be very yellow, and you will be particularly thirsty.
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You will feel very thirsty, and you will urinate less often, constipation, heart palpitations, swollen tongue, and so on.
1. Cause venous thrombosis.
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