Release date: 2017-02-07
Recently, an international study led by Loyola University in Chicago, USA, provided a compelling new evidence: exercise is not the key to weight control.
In a study of young people of African descent in the United States and four other countries, scientists found that both physical activity and sedentary activity were not associated with weight gain. The study was published in the journal PeerJ (click on the bottom left corner to read the original). Although the study is mainly aimed at young people of African descent, it also has some guiding significance for us.
Dr. Lara R. Dugas, the first author of the paper, said: "Our research shows that physical activity does not prevent weight gain."
Sports have many proven benefits, such as reducing the risk of cardiovascular disease, diabetes and cancer, and improving mental and emotional well-being. People who exercise regularly are healthier and have a longer life. But because sports clubs burn calories, it also increases appetite. Usually, many people will compensate for this part of the calories by eating more, or the movement will decrease in the following time.
Some experts believe that the lack of physical exercise is a key factor leading to obesity. But the new study did not find a clear relationship between weight gain and physical activity. In this study, the researchers objectively measured the physical activity of the subject over a period of time.
The study is one of the main outcomes of the Epidemiological Transformation Research Modeling (METS). The researchers tracked 1,944 adults between the ages of 24 and 40 from the United States, Ghana, South Africa, Jamaica, and Seychelles. The subjects were mainly African-American and covered a wide range of socio-economic classes. Dr. Amy Luke is a principal investigator at METS and is Associate Dean of the Department of Public Health Sciences at Loyola University.
Past research has shown that when people are asked about their physical condition, they tend to exaggerate their actual amount of exercise. In order to provide a more objective measurement, the subjects in the study continued to wear a tracking device called an accelerator at the waist for one week. These devices measure the wearer's energy consumption and count the number of steps. The researchers also measured the height, weight and body fat of the subject. After receiving the initial test, the subject was asked to receive a return visit after one or two years.
Ghana's subjects had the lowest average weight (139 pounds for both men and women), and the US average had the highest average weight (206 pounds for men and 202 pounds for women). Ghanaians are also healthier than Americans. 66% of men and 44% of women in Ghana meet the requirements of the US Department of Public Health for sports activities. For Americans, this figure is 44%. And 20%. The guide recommends that people exercise at least 2 and a half hours of moderate-intensity aerobic exercise every week.
Surprisingly, among the subjects in these countries, those who met the sports guidance increased their weight more. For example, American men who meet the mentoring requirements add an average of 0.5 pounds per year, while those who do not meet the requirements have lost 0.6 pounds.
The researchers did not find a sedentary relationship with weight gain or decrease. The most definitive factors associated with weight gain include weight, age, and gender at the time of initial testing.
The study was funded by the National Institutes of Health (NIH). The study titled "Accelerator Measurements of Physical Activity Status has nothing to do with changes in body weight in African adults in five different populations two years later."
In addition to Dugas and Luke, other researchers include Dr. Liping Tong from Loyola University, Dr. Ramon A. Durazo-Arvizu, Dr. David A. Shoman, Guichan Cao and Richard S. Cooper, and the University of Wisconsin-Madison. Researchers at Kwame Nkrumah University, the University Hospital of Lausanne, the Ministry of Health of Seychelles, the University of the West Indies, the University of Cape Town, the University of Cambridge, and the Norwegian Academy of Sports Sciences.
In summary, in order to maintain a healthy posture, "walking the legs" and "holding the mouth" can not be less.
Source: China Biotechnology Network
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