Benefits of carrots

1. Optimizes vision

The understanding of the western culture of carrots is "good for your eyes". Carrots are rich in beta-carotene, which are converted into vitamin A in the liver. Vitamin turns into a retina, rhodopsin, pigment for night vision.

Beta-carotene has also been shown to protect against macular degeneration senile cataract. One study found that people who consume large amounts of beta-carotene had a 40 percent lower risk of macular degeneration who burn less.


2. Help prevent cancer

These studies have shown that carrots reduced the risk of lung cancer, colon cancer and breast cancer.

Falcarinol is a natural pesticide produced by the carrot that protects its roots from diseases caused by fungi. Carrots are one of their only common sources of this compound. One study showed 1/3 less than the risk of cancer in rats eating carrots.



3 delay the aging

The high carrot level of beta carotene in it acts as an antioxidant in the body cell damage of normal metabolism. It helps slow the aging of cells.


4. Maintains healthier skin

Vitamin A and antioxidants protect the skin from sun damage. Vitamin deficiencies cause nails, hair and dry skin. Vitamin A prevents the appearance of premature wrinkles, acne, dry skin, pigmentation spots and uneven skin tone.



5 Help prevent infection

Carrots are known by herbalists to prevent infection. It can be used in raw or cooked grated cut and puree.

6 Promotes healthier skin

Carrots are used as a very inexpensive and affordable facial mask. The combination of grated carrot with a little honey. See the full recipe here: carrot mask.



7 Prevents heart disease

Studies show that diets rich in carotenoids are associated with a lower risk of heart disease. Carrots have only beta-carotene, but also alpha-carotene and lutein.



Regular consumption of carrots also reduces cholesterol levels, because carrots soluble fibers bind to bile acids.



8. Cleans the body

Vitamin A in the liver of toxins in the body wash. Reduce bile and fat in the liver. The fiber present in them carrots helps cleanse your colon and accelerate the movement of waste.

9 Protects teeth and gums

Everything is in crisis. Carrot cleans your teeth and mouth. Particles of the plate and food as well as toothbrushes or toothpaste bark. Carrots stimulate the gums and cause a large amount of saliva, which is alkaline, acidic producers, forming the cavity of bacteria balance. Minerals in the carrots to avoid damaging the teeth.



10. Avoid movement

All its benefits are no strangers that at Harvard University, a study of people who consume five or more carrots per week was less likely to suffer a stroke from an accident that they would like to eat a carrot a month or less.


carrots

He joked about carrots

The rabbit wants to eat carrots, but not overeat.

Only a rabbit eating carrot is like eating more than 20. Carrots are good for teeth they do not have artificial sugar and rabbit, but too many natural sugars can cause digestive problems and diabetes. Probably much better with carrot leaves!

Carrots are the second type of plant after the Pope.

The largest registered carrot is more than 19 pounds and more than 19 feet!

You can see it here, but they are not particularly beautiful!

There are more than 100 species of carrots.

Some are large, some are small and come in a variety of colors: orange, purple, white, yellow and red.

British women in the 1600s often used carrot leaves in their hats instead of flowers or feathers.

The "carrot" of the name comes from the Greek word 'green chloros'. "

The beta-carotene of the carrots, really, was named for its carrot.

The average American consumes approximately 12 pounds of carrots.

It's only one cup a week. It could easily triple, but also a variety of other vegetables.

How to walk your dog

For this activity it is necessary for a special person to dedicate time, love and patience to a pet, since it requires a lot of care and responsibility, especially when it comes to training or learning to walk a dog.

There are many other factors to consider, from buying the right strap and collar to setting expectations in order to reward the dog for a job well done. This will take time; however, you will soon know what to do so that your pet and you can make the experience of walking an excellent one.



Part 1 of 3:
Walking a dog: fundamental ideas
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Put a leash and a collar on the dog. There will come a time when your four-legged friend will know it's time to go for a walk when you simply take the leash. Use a collar since your dog is a puppy so you can introduce this idea to your mind from an early age. Place the collar on your dog's neck and say "Let's go for a walk" with the leash in plain sight.
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Keep the collar tight, but not too tight. You will have to make sure that the collar is not too tight on your dog's neck. A good rule of thumb is to make sure you can put one or two fingers between the collar and its neck. [1] Also, you will not want it to be too loose to slide over your dog's ears if you try to pull it out.
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Choose the side you want your dog to walk on. Coherence is important when training your dog for a walk. Choosing a side where the dog will walk will make it establish its place in the activity. The puppy will get used to walking with you to know what to expect. Just keep in mind that walking on a leash is not natural for your pet. [2] Therefore, you should expect there to be a period of adaptation.
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Pull the strap close to your body. The most important aspect of learning to walk your dog is to maintain control so that your pet does not order you during the walk. You are the boss and that should also be reflected in your relationship when walking. [3]
Wind your traditional belt around your hand until there is very little strap between your pet and you.
Pull the strap close to your body; however, let there be enough strap so that you allow your dog to walk naturally.
Your dog will feel the resistance of the leash and will realize that getting ahead of you is unacceptable.
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5
Talk to your dog. Your dog understands the tone of your voice. Do not feel frustrated. Encourage your dog with a phrase like "Good job" or "This is how it is done" when doing something right. Use a stern voice when you instruct him not to do the wrong things, such as barking at people passing by or growling at other dogs.
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Reward your dog with special treats. Use treats when you teach your dog to walk, but especially when you want to teach not to pull the strap. Reward it frequently and consistently. [4]
Save a treat that your dog likes, especially for training purposes. Many pets get quite excited with a piece of hot dog, cheese or dried meat.

5
Talk to your dog. Your dog understands the tone of your voice. Do not feel frustrated. Encourage your dog with a phrase like "Good job" or "This is how it is done" when doing something right. Use a stern voice when you instruct him not to do the wrong things, such as barking at people passing by or growling at other dogs.
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6
Reward your dog with special treats. Use treats when you teach your dog to walk, but especially when you want to teach not to pull the strap. Reward it frequently and consistently. [4]
Save a treat that your dog likes, especially for training purposes. Many pets get quite excited with a piece of hot dog, cheese or dried meat.


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Part 2 of 3:
Buy the right equipment to walk
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Talk to your veterinarian before buying equipment to walk. Your veterinarian will know your pet almost as well as you and will be able to recommend the type of walking equipment you may need. Trust the experience of the veterinarian when it comes to choosing a collar and a leash according to the weight or the specific body type of your dog.
He can help you with tips to avoid problems in your neck that may arise from the use of an inappropriate collar. [5]
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2
Buy the right strap and collar for your pet. There are quite a few necklaces and leashes available in the market, however, not all are suitable for your animal.
For example, a traditional buckle collar and a strap hook are usually used when the dog does not cause much trouble when walking. However, there is a variety of more restrictive straps and collars available for those who have more difficulties with non-cooperative pets. [6]
Gliding collars help keep a dog that is easily distracted under control.
The pack leader style collars are used with dogs that like to pull a lot.
Harnesses are useful with dogs that have long necks.
Some necklaces of special use are the necklaces that emit a slight electrical discharge, the necklaces that vibrate and the collars with GPS.
The glow of the dark necklaces will ensure you are visible to others.
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3
Consider using a marker device for training. Many consider this device as a safe and effective method to train a dog. Use it to reinforce good behavior and to communicate clearly and concisely with the dog.
 The click sound, followed by a treat, will communicate to the dog that did the right thing. [7] The method with marker device is effective when you train a dog to walk and for other aspects of training, for example, when training him so he knows where to pee, bark and do tricks. Use the dialer device, followed by a treat, during the following cases:
When the dog starts to put on the leash.
When you want the dog to stop resisting the leash.
As the dog walks behind you or by your side.
Repeat use periodically throughout the ride.
Take off the leash when you return home.
Repeat daily use.


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Part 3 of 3:
Make sure the ride is comfortable
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Realize when it's too hot to walk your dog. The temperature will often determine the best time to take your dog for a walk. The right times of the day to walk a dog are very early in the day or very late at night. Avoid midday as the pavement may be too hot for your legs.
The best way to test if it is too hot is to place the bare hand on the pavement. If after only five seconds you have to remove the hand, then it is probably too hot. [8]
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It takes enough water and food. Along with the bags to collect your dog's feces and the marker device, bring a portable container and a bottle of water for your pet.
 Keeping your dog hydrated is important when walking for long periods of time or during the hottest hours of the day. In the summer months it is very important that your dog has plenty of water. [9] The healthy and easy to carry snacks are:
Strawberries
Watermelon without seeds
Sliced ​​apple
Blueberries
Carrots
Crushed ice for the hottest days
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3
Rest when necessary and look for shade when you can. Do not overdo it when you look for your dog to get used to walking with you, especially if it's the first time you have a necklace and a leash. Your dog will pull enough and there will be a lot of resistance, which can exhaust it. Find a shady place to rest for a few minutes along the promenade.

STATUE OF LIBERTY.

Statue of Liberty, is one of the most famous monuments in New York, the United States and around the world.

 It is located on Liberty Island south of Manhattan Island, next to the mouth of the Hudson River and near Ellis Island. The Statue of Liberty was a gift from the French to the Americans in 1886 to commemorate the centenary of the Declaration of Independence of the United States and as a sign of friendship between the two nations. It was inaugurated on October 28, 1886 in the presence of the American president of the time, Grover Cleveland.

 The statue is the work of the French sculptor Frédéric Auguste Bartholdi and the internal structure was designed by the engineer Alexandre Gustave Eiffel. [2] The French architect Eugène Viollet-le-Duc was responsible for the choice of copper used for the construction of the statue. On October 15, 1924, the statue was declared a national monument of the United States and on October 15, 1965 Ellis Island was added. Since 1984 it is considered a World Heritage Site by Unesco. [2]

The Statue of Liberty, in addition to being an important monument in New York City, became a symbol in the United States and represents, on a more general level, freedom and emancipation with respect to oppression. Since its inauguration in 1886, the statue was the first vision that European immigrants had when arriving in the United States after crossing the Atlantic Ocean.
 In architectural terms, the statue is reminiscent of the famous Colossus of Rhodes, one of the "seven wonders of the world." She was nominated for the "new wonders of the world", where she was a finalist.
The name assigned by Unesco is «National Monument Statue of Liberty». Since June 10, 1933, the National Parks Service of the United States has been responsible for its administration.

The statue represents a woman in an upright position, dressed in a kind of wide stole and on her head has a crown with seven peaks, symbolizing the seven continents and the seven seas. [59] There are 25 windows in the crown that represent gems found on the earth and the rays of the sky that shine on the world. [59] The diadem remembers the one that carried Helios, personification of the Sun in Greek mythology. Bartholdi opted for the crown, and decided not to wear the Phrygian cap, a symbol of freedom since antiquity. The statue holds in its right hand a lit torch, held aloft.
The torch refers us to the century of lights, although some consider it a freemason symbol. [60] In his left hand he holds a tablet, which he holds close to his body.
The tablet evokes the law or the right, and has the date of the signing of the Declaration of Independence of the United States, written in Roman numerals: JULY IV MDCCLXXVI

Lighting system
The original lighting system has been replaced several times by more modern equipment. In 1916 President Woodrow Wilson inaugurated the first system that introduces the lighting of the statue, consisting of two hundred and forty-six projectors, using 250 W incandescent lamps, located at the tips of the star at the base of the monument and other points on the island, and fifteen 500 W on the torch. Later, in 1931 and 1945 the previous illumination intensified, more colorful effects were added and shadows were eliminated.

Redesign of the torch
Together with the lighting improvement project of 1916, the torch, which was initially of copper, was renovated using a total of 600 individual stained glass pieces of yellow color to enhance and beautify the lighting effects upon lighting.
 This work was executed by Gutzon Borglum, known for his colossal sculptures of Mount Rushmore. The light output of the torch was also increased. On July 30 of the same year, due to an act of sabotage known as Explosion Black Tom, access to the torch was officially closed. [31] [45]

Elevator and heating
Although the construction of the base began, the installation of an elevator was already planned, the first was not installed until 1908-9. Subsequently it was replaced by a more modern one in 1931.

In 1949 a heating system was installed at the base of the statue.
 Before this improvement, during the winter months, the enormous mass of the base (about 48,000 tons) became increasingly cold, and when the air became warmer there was a condensation that impregnated the walls and harmed the structure and its facilities. On the other hand, the heating, in addition to solving the problems of cooling and condensation in the base, added greater comfort to employees and visitors.

Structural improvements
In 1937 several platforms and stairs were replaced on the pedestal of the statue. We proceeded to an inspection of the structure and the copper plates of the statue, from the torch to the beams on which the structure rests.
The iron support was replaced in the sections where it had been oxidized, and the rivets that had been released were replaced by new ones and the frames of the crown of the head were reconstructed with new iron ones.
 No renovations were made to the spiral staircase inside the statue.

LABOR WELFARE.

How to achieve work welfare? Follow these tips
 labor welfare
How much do you work for in your company? Do you think this will help improve your performance? No doubt enjoying well-being, not only emotional, but also mental, is of great help, so bringing this to work issues is part of the way that will guarantee your success in business.

There are several elements that we must consider to achieve it:

Create positive emotions, including happiness and satisfaction.
Have a commitment
Better relationships
Know the purpose of our actions.
Have achievements, both individual and collective.
Leading companies worldwide are already following these processes with their workers, giving it the importance it deserves, integrating it as part of the company's objectives.
 Achieving workplace wellness may sound like a very high goal, but I assure you it will bring you great benefits.

Work well-being, a safe bet
Various data ensure that a person who has well-being at home, will bring that same well-being to work.
Therefore, as a company, we must support harmony outside the office. Factors such as a bad boss undoubtedly have an impact on low morale not only in the workplace, but also bring consequences at home.

Another factor that must be taken care of is the level of stress, for this we must have a good work organization, well-planned goals and teamwork, in short, to look for the best working environment for all. They win, we win.

Having work welfare brings great advantages over the competition, in addition to achieving committed workers. The detail is not whether a company wants to invest or not in ensuring the welfare of its employees, but in the consequences of not doing so, something that would undoubtedly bring great losses to the company.

Are you listening to your employees?
You can start with a work climate survey. Feedback is key not only internally, but for the good treatment of our customers. The joke is to take action on the recommendations of our employees to meet their needs focused on workplace welfare. Employees who are not comfortable, do not do their job well, resulting in poor customer service, and consequently loss of sales.

It is likely that you have a Human Resources Department that already performs this function of listening to the needs of employees, for example, through online surveys, and periodically analyze if your employees are motivated and satisfied. Here the important thing is to see how to improve, and as you care about raising the satisfaction rate of your customers, you should do the same with those who work near you.

As with the consumers of your brand, products or services, you can collect from your employees, quickly and easily, information on behavior patterns, positive or negative experiences for their work well-being, barriers and possible solutions to their problems.
 The ideas of your employees can not only help you strengthen internal relationships, but also in business issues, for example, for the implementation of new products, something that will undoubtedly make them feel that their ideas are used for the benefit of the company.

I invite you to read: Survey of job satisfaction, 5 Benefits of applying it in your company.

I assure you that your employees have endless creative ideas, have suggestions that can help you solve problems with the client, this in turn gives them security and confidence not only in their work, but in their personal lives. Growing self-esteem, not only grows personally, but also in the workplace.

Recognize their achievements and you will impact their mood and commitment to their daily work. Employees want to be heard, involve them !, and you will have more participation on your part to achieve the objectives of the company and seek customer satisfaction and of course have more sales.

THE ROMAN COLISEUM.

The Colosseum (in Latin: Amphitheatrum Flavium Romae) is an amphitheater from the time of the Roman Empire, built in the first century AD. C. and located in the center of the city of Rome. 

It was originally called Flavian Amphitheater (Amphitheatrum Flavium), in honor of the Flavian dynasty of emperors who built it, and was renamed Colosseum by a large statue that was nearby, the Colossus of Nero, which has not reached us. For its conservation and history, the Colosseum is one of the most famous monuments of classical antiquity. It was declared a World Heritage Site in 1980 by Unesco and one of the New Seven Wonders of the Modern World on July 7, 2007.

The materials used in the construction of this are blocks of travertine, concrete, wood, brick, stone (tufa), marble and stucco. In antiquity it had a capacity for 50,000 spectators, with eighty rows of stands. [1] [2] [3] Those who were near the arena were the Emperor and the senators, and as they ascended they placed the lower strata of society. Gladiator fights and public shows took place in the Colosseum. It was built just east of the Roman Forum, and the works began around 70 AD. C. and 72 d. C., under the Emperor Vespasian. The amphitheater, which was the largest ever built in the Roman Empire, was completed in 80 AD. C. by the Emperor Titus, and was modified during the reign of Domitian. [4] Its inauguration lasted 100 days, involving all the Roman people and dying in its celebration dozens of gladiators and beasts who gave their lives for pleasure and the spectacle of the town. [4]

The Coliseum was used for almost 500 years, celebrating the last games of history in the 6th century, much later than the traditional date of the fall of the Western Roman Empire in 476 AD.

 The Byzantines also used it during the 6th century. In addition to gladiator fights, many other public spectacles took place here, such as naumaquias, animal hunts, executions, recreations of famous battles and plays based on classical mythology. The building ceased to be used for these purposes in the High Middle Ages. 

Later, it served as a refuge, factory, seat of a religious order, strength and quarry. From its ruins, abundant material was extracted for the construction of other buildings, until it was converted into a Christian sanctuary, in honor of the captives martyred during the early years of Christianity. This measure helped to stop their plunder and to keep it.

Although the structure is seriously damaged due to earthquakes and stonemasons, the Coliseum has always been seen as an icon of Imperial Rome and is one of the best preserved examples of Roman architecture. It is one of the most popular tourist attractions of modern Rome and is still closely linked to the Catholic Church, so the pope heads the way to the amphitheater every Holy Friday. [5] [6]

History

Description Edit

The Flavian Amphitheater is a huge oval building 189 meters long by 156 wide and 57 meters high, with an elliptical perimeter of 524 meters.

 It is often said that this building has been a model for modern sports venues, since it has a very ingenious design and effective solutions to current problems.

The sand and the hypogeum Edit

The hypogeum outdoors.

The pitch itself was an oval of 75 by 44 meters, and was actually a platform built of wood and covered with sand. The entire subsoil was a complex of tunnels and dungeons (the hypogeum) in which the gladiators, the condemned and the animals were housed. The ground had several trapdoors and forklifts that communicated with the basement and could be used during the show.

The plan of the sand had a complete drainage system, connected to four imposing sewers.

 It has been suggested that they obey the need to evacuate water after naval shows. However, it seems that already Domiciano, abandoning the idea of the naumaquia, paved the sewers and placed the forklifts in the sand for the gladiatorial combats. 

The wooden deck is no longer preserved, so that the entire underground labyrinth remains outdoors today.

The structure Edit

Section by the cave.

The Roman Coliseum was perhaps the greatest work of Roman architecture, and it used the most varied construction techniques.

 The pilasters and the arches are travertine placed without mortar. In the lower parts and in the basements the tufa was used in the same way. 

Many of these ashlars were stapled with metal staples.

 The vaults holding the cave were made by pouring cement mortar directly on wooden forms, an innovation that lightened the factory.

The fact that the building was located on a lagoon forced to excavate up to 14 meters of unusable silts and make a foundation of almost 13 meters of opus cementicium (courses of lime mortar and alternate stones).

The facade Edit

The original facade. From bottom to top, the columns are Ionic, Corinthian and composite.

The facade is articulated in four orders, whose heights do not correspond to the interior floors. The three lower orders are formed by 80 arches on pilasters and semi-columns attached to a purely decorative entablature. The fourth is formed by a blind wall, with attached pilasters and windows in one of every two bays.

Regarding the aesthetic aspects, we see the combination of arch and lintel and the overlap of Tuscan, Ionic and Corinthian orders. The last floor has an undefined style that was cataloged in the sixteenth century as a composite. It was common to superimpose different styles on successive floors, but it was not usual to make buildings with four overlapping orders. The communications between each floor were made through stairs and concentric galleries.

HOW TO PREPARE CHILDREN FOR SCHOOL.

How to prepare children for school In many countries, the three years mark the beginning of pre-school education.

Although most programs are optional, many parents choose to send their children to school around the age of three.
Some children have previously been in daycare or kindergarten, others have been at home with their parents, relatives or a family. caregiver, and others have had a combination of both.

 Whatever the arrangement your preschool has had, if you decide to send him to school at age three, it is advisable to prepare him for this exciting step forward. As with any transition, it is very important that the child becomes familiar with the changes that lie ahead.
 The more we prepare, the easier it will be to join the school. What can we do to prepare them for school? Talk to them about the school, explain what it means to go to school, what happens at school, who will go, who is the teacher, what activities are done at school and let him ask you many questions about the school. If you have a little brother or friend who is already in school, suggest that he / she ask questions to him / her directly and share his / her experience. If you have the opportunity, visit the little school together. In many schools, they will allow you to spend some time with your preschooler in class before you have to leave. This is what experts recommend.
In general, parents start spending time in class and little by little they let the child spend more time on their own. At home they can read books about the school and even You can make your own book with pictures or drawings about the first day of school; What is going to happen? Who will accompany him? Who will be at school? What will it take? What activities are they likely to do? Who will pick you up? Reading books over and over again will help you feel more confident during your transition to school. Ask at school if you can bring a household item to have with him / her during your first few days. Having a familiar object in an unfamiliar environment will help you feel more comfortable.
 Sometimes, it's a good idea to give him a picture of his family that he can look at when he feels lonely or missed at school. At home, talk openly about the feelings one has when embarking on a new unknown adventure. Talk about the fear you may feel but also about the emotion that you feel your child will start school. Speak positively about school and show your enthusiasm for the new stage ahead.
 It is likely that you feel ambivalence about your preschool starting school, but we must try not to show them this ambivalence to give them the sense of security they need to enter a new phase in their development. It is important that you feel comfortable with the school or program you have chosen. Do not be afraid to ask questions, talk to the staff and make sure that all your questions have been resolved. If you are not comfortable with the program, it is very easy to transmit this feeling to your preschool. We always want to give you a message of security "I know that this is a great place for you where you will learn and make friends".
 Our security will engender security in them. It takes advantage of this achievement in its development to reflect on these last three years. Talk about all the goals you have achieved and how wonderful it is that you are ready to start the school. Celebrate this moment and enjoy it! Dr.
Helena Duch is a child and family psychologist specializing in working with families who are planning, expecting and raising children in early childhood. Dr. Helena holds a Ph.D. in child and school psychology from New York University and a master's degree in Child Development Psychology from Columbia University and a degree in Clinical Psychology from Ramon Llull University in Barcelona. In addition, Dr. Helena is licensed as a psychologist in the state of New York and in Spain, her native country.
NOTE: This article is for educational purposes only and does not replace a medical or psychological consultation. You should not use this information to diagnose or treat a health or behavioral problem, but consult a doctor or mental health professional who will examine you in person and who is authorized to practice your profession in the area where you live.

HOW TO IMPROVE YOURr POSTURE.

How to improve your posture

Having a good posture is simple and is very important if you want to keep your body and mind healthy.

 When you exercise a correct posture, your body aligns itself. This can relieve fatigue, back pain, neck and head. Having an acceptable general health and sitting or standing properly, will elevate your bearing and confidence. This article will show you several ways to develop and maintain good posture.

1
Think of a rope. Always imagine that a rope that comes from above the head, pulls you gently towards the ceiling. Visualize techniques like this can develop your sense of proper posture and height effectively.

2
Ask someone to make a big X with tape on your back, from one shoulder to the opposite hip. Then, place a straight line across your shoulders by closing the X on top. Use it during the day to help reeducate your back. This works very well if you keep your shoulders back before wrapping, use wide, non-elastic tape and change it daily.

3
Avoid sagging shoulders when you walk. Try to walk as if you were swinging a book in your head.


4
Use the color If you need to remember the posture, think of an exclusive object or color. Every time you remember the object, check your posture.

5
Focus on the calves. Change your posture and balance yourself depending more on the calves. Rest and put energy in your steps. You will see that the upper part of your body will relax and assume an upright posture which will remove pressure on your back, shoulders and neck and will work on your abdominal muscles. This is fabulous, as you will strengthen your ankles and your abdominal muscles like stone!

Sit firmly in the chair! How many times did your mother tell you that? For many people, this suggestion was accompanied by "eat your peas" or "look where you walk". Mom was right, at least in the posture.
Especially because many people spend the day sitting at their work. It is important to follow this basic guide to improve posture and health.
If you work sitting during the day and have the option to choose a chair, choose an ergonomic that supports your weight and adjusts to your height. If there is no option, use a lumbar support pad.
Align your back with the back of the chair. This will help you avoid stooping or leaning forward, which you could do after sitting for a long time at your desk.
As in the standing posture, keep the shoulders straight and aligned, your right head and neck, back and heels aligned.
Keep both feet on the floor or footrest (footstool, if you do not reach the floor with your feet).
Adjust your chair and your position so that your arms are flexed, not out. That the elbows are flexed between 75 and 90 degrees.
If they are straighter, you are very far back, and if they are more than 90 degrees, you are sitting very close or very stooped.

Take breaks standing. Even when you have the best postures in the best chairs (and it is debatable if there is such a thing [1]), you need to stand up, flex, walk around, do some exercise or just stand still for a few minutes.
Your body was not designed to remain seated and in recent studies from the University of Sydney it was found that sitting for prolonged periods is a risk factor of cause of general death, so regardless of your physical activity. Move on!