6 popular misconceptions about the human body Bashny.Net

"Well known" does not mean the right - publicized stereotypes do not stand the test of life realiyami



Every year more and more committed scientific discovery, humanity mastered space, penetrates into the deep ocean, there are many theories to explain a particular phenomenon of the world. Are leaps and bounds ahead physics, chemistry, biology, information and computer technology, but still there are people whose views about their own body stuck somewhere in the middle of the last century. To your attention - the six most common myths about your body.

1. "Sitting close to the TV screen, you can damage your eyesight"

As a child, the parents probably told you that you can not watch TV, sitting at a small distance from the screen - supposedly so can greatly damage the eyesight. However, this is not true - if there is a causal connection between the close proximity to the screen and visually impaired, it reversed: people forced to sit closer to the TV, for example, because of the short-sightedness.

Numerous studies experts tried to figure out what is dangerous proximity of the screen to the eyes, but no facts proving the harm watching TV on a small distance to detect and failed. Most likely, this error appeared a few decades ago when in TVs and computer monitors used cathode ray tubes that emit electromagnetic waves, but it is worth noting, by themselves they are not able to impair vision.

After long watching TV or working at a computer, you can really feel that the eyes are tired and frustrated, but the reason is not in the screens themselves, and that vision focusing on something you rarely blink. You can even sit close to the TV - your vision is not threatened, if you often get distracted, and even better, to do exercises for the eyes.

2. "Healthy teeth should be white and shiny"

If you believe the advertising toothpaste, shine and snow-white teeth talk about their perfect condition and looking to shoot in these videos of people with model looks, sparkling with their smiles, it is easy to believe. In fact, white teeth are more natural than a woman's breasts with silicone implants. The natural color of teeth - yellowish, and even if regular oral care you can not even find "Hollywood" smile, do not be upset, and try to "otdrait 'teeth to a shining white.

The long and vigorous orudovanie toothbrush may damage the enamel and gums, increase the vulnerability of the teeth. "Whitening" toothpaste property - nothing more than a publicity stunt, if the paste contains active substances that lighten the enamel, they thereby destroy it.

To keep your teeth healthy, you need to clean them twice a day, but as mentioned above, without excessive fanaticism. Also, eat less sweets, and if you smoke, try to get rid of this bad habit - the substances contained in cigarettes adversely affect oral health.

3. "The ability to turn off the language of a tube is determined by genes"

You probably have heard that the language of the longitudinal roll tube may be the only people whose parents also have this ability. I must say it is quite popular misconception - some school teachers use it to explain even the children are the inheritance of genetic traits, however, there is no scientific evidence of this phenomenon, so it is a myth.

Back in the 1950s, scientists have put several experiments during which it became clear that this property is not inherited. Among children 6-7 years slightly more than half (54%) could collapse tongue into a tube, and for children 12 years this number was already 76% - in other words, genetics has nothing to do with it, a person can just learn it useless gates in general the trick.

The first false information about the genetic nature of the ability to twist the language of straw appeared in an article published in 1940. Its author excitedly claimed to have discovered a "new characteristic feature is inherited." This duck began to quote in the scientific and popular publications, and gradually it has become almost an axiom. If you are going to have to hear something like that, tell the person that his attention long ago obsolete.

4. "After the death of a human hair and nails continue to grow for some time"

Judging by the number of relevant search queries on the Internet, many people still believe this strange myth. Of course, it is better not to try to verify the assertion in practice, the days and nights on end sitting in the morgue, and watching the bodies or say, digging up the grave - you just do not understand. It is better to take into account the arguments of scientists.

The growth of hair and nails after cardiac arrest, as well as other physiological processes in the body, stops as it requires nutrients, the body's supply of oxygen and blood circulation - nothing like this happens in a corpse.



The belief that hair and nails continue to grow in mysterious ways, it was extremely common even during the First World War. For example, in the famous novel "All Quiet on the Western Front" is an episode in which one character says to another: "It suddenly occurs to me that these nails do not cease to grow, and after Kemmer dies, they will grow more long time as ghostly white mushrooms in the cellar "- thanks to the power of artistic expression Erich Maria Remarque many believed his character. It should be noted that one of the reasons for the popularity of this confusion is the fact that after the death of the human body, usyhaya, reduced in size, so the nails and hair appear longer than during his lifetime.

5. "Flat feet can cause injury"

Severe form of flatfoot is able to deliver the young man to serve in the army - some young men for this special wear flat shoes to have a legitimate reason, is called "hang," when in fact flat can hardly get by this method. Whatever it was, many believe that a guy with a flat-footed in the military has nothing to do - supposedly it can cause injury during training and combat training drill. In some countries, during the Second World War because of flat feet was "rejected" thousands of conscripts, which probably saved many of their lives.

Traumatic flatfoot was refuted in a study conducted in 1989 in the United States. Researchers surveyed 300 soldiers one of the largest US military base Fort Benning and it turned out that the soldiers with flat soles of the feet are less prone to injuries than men with a "normal" foot. The idea is that military service should encourage more young men with flat feet, not without it or do not pay attention to this feature of the bend of the foot.

6. "Athletes are contraindicated to have sex before the decisive matches,"

This misconception is so common among athletes, some coaches forbid his players to make love in a month before important competitions. The myth about the dangers of sex for the athletes entered in the cinema - so, in the film "Raging Bull" heavyweight boxer (Robert De Niro) is necessary to remove sexual arousal before the fight with the help of ice water. Another famous movie boxer - Rocky, played by Sylvester Stallone, was also forced to conflict with the coach because of sex with my girlfriend.



The rule of abstinence is valid only for male athletes, as it is believed that sexual intercourse increases the level of testosterone in women, and thus increase their chances of winning. There is a contradiction - if sex "strengthens" women, why men allegedly acting in the opposite way?

The myth that sex detrimental effect on athletic performance men were scattered back in 1995, - the staff at Yale University studied the performances of eleven athletes, and in one case, athletes avoid sexual activity before the competition, and in the other were sexually active. It was found that sex does not affect the preparation of athletes for the match, and in some cases shown after sex, the results were even better than abstaining from it.

via factroom.ru