People with tendency to Obesity today are much thicker than 40 years ago. The tendency is also true for people without this Disposition. The researchers advise to take a look back on the eating and exercise habits of the 1960s.
No matter whether genes preloaded table for Overweight or not, the people in industrial countries to lay in the cut for about three decades, a lot of weight. The show, at least from a large Norwegian study in the “British Medical Journal” published. The group of people with a genetic Disposition for Obesity, on average, more than others.
The Team of Maria Brandkvist of the Norwegian University of science and technology in Trondheim, analyzed data from almost 120 000 Norwegians between the ages of 13 to 80 years. These ranged from 1963 to 2008. A particularly significant increase in weight there was between 1984 and 1997. It is true, for example, people who were born after 1970, as a young adult more than those with earlier date of birth. The researchers conclude from their data that there are approximately since the 1980s, an environment that is Obesity.
The genetic risk for Obesity, although in different population groups, promote worldwide people are different and also the environment of Overweight, more or less. A Combination of genes and environmental factors exist, however, in the entire world, said Brandkvist. Prevention strategies should, therefore, address the entire population, the researchers write.
Obesity has almost tripled
The Rate of obesity has eight, according to the world health organization, WHO, from 1975 to 2016 on a global, nearly tripled. In 2016, 13 percent of adults were obese.
The Body Mass Index (BMI) in the normal range of 18.5 to under 25. It is calculated from the weight in kilograms divided by body height to square. He is therefore given in kilograms/square meters (kg/m2). Overweight begins at a BMI of 25 and obesity at 30.
According to the study, the difference in BMI increased from people with or without such genetic predisposition since 1960. In people with a high BMI greater than slimmer. The researchers, the people divided into five groups – from the largest genetic Disposition for Obesity to the lowest. In the study, for example, a 35-year-old men with the highest Disposition for Obesity, in 1960, had. in the cut a to 1.20 kg/m2 higher BMI than those in the lowest In the year 2000 the difference between men with high and low MRP was, on average, already 2,09 kg/m2.
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Not only Genetic Disposition is crucial
Men with a predisposition to Obesity had become in the 40 years so, on average, significantly thicker than those without such gene variants. In the case of a 35-year-old women, the BMI difference between the genes increased preloaded table and unloaded people, an average of 1.77 kg/m2 to 2.58 kg/m2. The difference in the development between people with and without a slope to the Overweight (on average 0.89 kg/m2 for men and 0.81 kg/m2 for women), the researchers on the Interplay of environment and genes.
“Our study cannot answer about the causes of the obesity epidemic,” says Brandkvist. Useful a look back, as life in the 1960s was, “as it is not so easy or even impossible to decide for such a unhealthy lifestyle,” she suggests. “What and how much we have eaten back then, how we slept and how much we have moved?”
A Variety Of Causes
Their hypothesis is that the obesity epidemic is associated with too much food and too little exercise – both of which is also socially conditioned. In addition, toxins and microorganisms could have contributed to it.
In an Editorial In the journal American scientists suggest to look more to individual groups of people and to explore the individual causes of Obesity, the better to keep track of instead of just population-wide strategies.
The world health organization (WHO) recommends, in addition to a healthy diet for adults is 150 minutes of physical activity per week. In children, it should be an hour per day. Employers should offer healthy food and the possibility to practice sports.
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