Why do people get tired and why do people get tired?

Because people are not immortals, their energy is limited.

If a person doesn't get tired, then a person is a robot.

1. Lack of exercise.

Exercise in the body can not only fight fatigue by activating muscles, but also improve the quality of our sleep by balancing the internal biological clock.

2. Unreasonable diet.

Due to their busy work, office workers often skip lunch or just nibble on sandwiches and other foods on the computer, which makes them feel tired and lack of energy in the long run. In order to get back to the best of your body, a good diet is very important.

3. Not drinking enough water.

It's hard to remember to stay hydrated throughout the day, but having a good habit can help your body fight fatigue. Experts say that the human body loses nearly one liter of water every day. If we don't replenish enough, our muscles tend to atrophy, communication between cells is hindered, and the body is damaged.

I think if you feel a little tired, it may be because you do more during the day, or because you don't get enough sleep. There is also nutritional deficiencies. These can easily make the body feel some fatigue, including some anxiety in the psychological aspect, or some work or study pressure is also a situation that makes people feel some fatigue.

These are all things that need to be adjusted by yourself, including psychological aspects, and learn to release your emotions.

Fatigue can actually be seen as a form of poisoning. Lactic acid is produced when people's muscles are working. If lactic acid can be removed from the muscles, the muscles can immediately start working again.

During muscle activity, the body also produces other substances called "fatigue toxins".

The blood carries these substances to all parts of the human body, and in this way, the muscles themselves, as well as the entire body, especially the brain, are fatigued. Scientists have conducted interesting experiments on human fatigue: if a dog is forced to move non-stop until it falls asleep from exhaustion.

The blood is then injected into the body of the other dog, and the second dog immediately becomes "tired" and falls asleep.

If the blood of a fully awake dog is injected into the body of a dog that has fallen asleep due to fatigue, then the dog will wake up immediately and will not feel tired.

However, fatigue is not entirely a chemical process in the human body, fatigue is also a biological process in the human body, after all, we can not "get rid of" fatigue, but should let the body's cells get enough rest when fatigue, so that the deficit can be repaired, the nerve cells of the brain "recharge", and at the same time, the muscles and joints must be replenished with depleted "lubricants". Sleep as a way to regain strength.

Always essential.

In general, the best way to get rid of fatigue in a certain part of the human body.

It is to engage the other part in an active activity that promotes breathing. In this way, the blood can circulate more quickly, and the glands can function more actively, so that waste products can be removed from the body. If you're feeling tired, the best thing to do is get some sleep.

New research by scientists in South Africa shows that fatigue comes from the brain, not the muscles themselves. But it can still have a serious impact on athletes' performance. This finding may be used for chronic fatigue and other serious diseases.

There are many theories about the causes of fatigue.

When people work or exercise to a certain time, there will be a temporary decline in the working ability of tissues, organs and even the whole body, which is called fatigue.

Fatigue is a physiological phenomenon in which fatigue disappears after rest, and the ability to work is restored. Traditionally, fatigue has been seen as the result of overworked muscles stopping their normal function. In the past, scientists had three main explanations for the causes of fatigue.

The theory of depletion of energy substances: when muscles are active to fatigue, the content of energy substances such as glycogen, adenosine triphosphate, phosphocreatine, etc. decreases. Therefore, it has been proposed that fatigue is caused by the depletion of these substances.

The theory of accumulation of fatigue substances: some substances in the muscle or blood, such as lactic acid, pyruvate and other acidic substances, increase with the deepening of fatigue. Therefore, it has been suggested that fatigue occurs due to the accumulation of metabolites during muscle contraction.

The theory of imbalance of the stability of the body's internal environment: the acidic metabolites produced during exercise cause the pH value of the body's body fluids to drop, and when the pH value drops to a certain value, the concentration of water and ions inside and outside the cells will change, and the human body can no longer engage in exercise. Therefore, it has been suggested that fatigue is caused by an imbalance in the stability of the body's internal environment.

However, although there is some basis for the above claims, scientists still have different views. Now, there's growing evidence that our brains are responsible for fatigue after long hours of work or exercise.