Many people who try to keep fit by using jogging, swimming or in the gym, spend their time and effort wasted. It turned out that these types of physical activity does not improve the health of about 20% of people.
Scientists attribute this to genetic factors, and such people are advised to take care of their health in other ways - for example, to reconsider their diet or take medication.
By definition, the American College of Sports Medicine (American College of Sports Medicine (ACSM)), aerobics - a set of any exercise to train large muscle groups, which are combined with certain breathing exercises. Aerobic exercises help to accelerate the burning of calories to stimulate more intensive work the heart and lungs, improves cardiovascular activity and endurance. Besides the obvious physical benefits, aerobic exercise improves mood, relieve depression and anxiety. Active heart and strengthen the immune system reduces susceptibility to infection. One of the main advantages - improved muscle tone and increase life expectancy.
Scientists from the University of London, say that aerobic exercise is not all benefit. It turned out that their effect on the human body is genetically predetermined: training in the gym does not have a beneficial effect for about 20% of the subjects. These people, unlike the others, with regular aerobics does not decrease the risk of developing cardiovascular disease and diabetes. Researchers advised such people to give up in the gym, swimming and jogging, but instead to normalize your diet or drink medicines.
James Timmons of King's College, University of London, who led the work, says that this study - the first step towards the creation of personalized medical treatments. He hopes that in the future the selection of an effective means to strengthen the heart muscle will begin with the analysis of DNA, and thanks to the study of human genetic code that was decoded a decade ago, was first used in order to optimize medical care.
The study involved 500 people in Europe and the United States who were engaged in aerobic exercise for 30 minutes a day, five days a week. The subjects were examined at the end of the sixth, twelfth and twentieth week of classes. Most of them showed a significant improvement, however, in nearly 20% of the subjects did not increase the amount of oxygen consumed during exercise (namely, it is the main indicator of exposure to aerobic organism). In 30% was observed greater sensitivity to insulin - this indicates that the risk of diabetes in these people stayed at the same level.