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Exercise: do you eat more?

Exercise: do you eat more?



Have you ever wondered if exercise makes you eat more? You are not alone. Scientists investigating our response to food and how is modified by the physical activity. Specifically the response in an area of the brain known as "bonus to the food system". Keep reading to find out what they have discovered.

During the year we release serotonin, which affects our State of mind and also regulates our food consumption; dopamine, which is responsible for pleasure, which helps prevent the search for satisfactory sources less healthy as sweets, tobacco or drugs; and the endorphins, which are natural analgesic and reduce pain, anxiety and stress. Although we can say according to studies at the Brookhaven National Laboratory is not 100% sure that humans release dopamine during aerobic exercise, this was demonstrated only in animals.

Specialized scientists in studying the brain thought that changes in these hormones were responsible for our desire to eat or not to eat after an intense physical activity. In fact, what we eat depends on a variety of factors.

Recently, scientists have been investigating how exercise alters the area of the brain known as "bonus to the food system", the area that controls whether we like and we want to eat after a physical effort.

A Brigham Young University study has shown that exercise does not make you eat more.

In a study published in Medicine & Science in Sports & Exercise, the researchers James LeCheminant and Michael Larson assessed 35 women: 18 had normal weight and 17 had obesity clinic. They participated voluntarily in the experiment to determine his motivation in relation to food.

These women stepped in quickly for 45 minutes on a treadmill one morning. At the time of completing the exercise, underwent an electroencephalogram, (a study that measures the electrical activity of the brain) while showing them a series of 240 images, of which 120 were food and 120 were flowers (which served as a control).

Repeated the same experiment a week later, the same day of the week and at the same time, but this time to do exercise. In addition, we were asked to carry a record of everything that had eaten and their physical activity in the days in which the experiment was conducted.

The researchers responsible for the experiment wanted to see if obesity was an influence that were motivated by food consumption. Surprisingly women past weight in the experiment didn't eat on the days that made exercise "to compensate" the calories that were burned during physical activity. It is clear that there was an important role of exercise in their neuronal response.

In other women, brain activity was much lower to see the images of food after workout, while the days not practiced the routine treadmill, activity increased.

It found a few scientists who studied 30 young people (men and women in their twenties, active and healthy weight) in two sessions in a lab at California Polytechnic State University in San Luis Obispo. They evaluated the brains of the volunteers with functional studies of magnetic resonance imaging (or MRI). The study was similar to the previous but instead of getting a treadmill they hopped on a stationary bike, they waited an hour and were subjected to the study of magnetic resonance imaging while they saw images on a computer and this happened on one occasion when they performed exercise and elsewhere, when they had not performed exercise.

The results showed that areas of the brain that are considered "bonus to the food system" including the insular, put amen and operculum romantic, which control when we like and we want food, was more activated in people who do not had been exercising especially with foods high in fat and sugar-filled.

But the interesting thing is that perhaps the brain not works the same in everyone. A study published in The Journal of Obesity that included 34 obese people found that when it is following them for 12 weeks in a supervised program for weight loss, weight loss varied much. The study was designed so that they lost 500 calories per session and could eat what you want. At the end of the 12 weeks, 20 people fell 11 pounds on average, but 14 people fell only one or two pounds. Those who did not lose weight had a very high response in gratification to the food system, while the others are not.


The author of this study says exercise can have an impact on gratification to the food system, but depend

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