Millions of people around the world are struggling to keep fit by jogging, swimming or aerobic exercise may have wasted his time with futile, so say the scientists.

According to a recent study, the benefits of exercise were not the same for every individual, but it depends on each gene. In fact, there are people who are not deriving any benefit though has been a routine practice.

This is revealed from the research conducted by researchers from the University of London, England, on 500 respondents in the United States and Britain. James Timmons, who led the research said, as much as 20 percent of the population or 1 in 5 people will not gain significant fitness benefits of doing exercise.

According to Timmons, the results of this research could pave the way for the discovery of a more personalized method of examination, for example via a DNA test to find out how best to prevent disease. Because exercise training has no impact to their health, he advised them in this group focus more on healthy eating.

In this research, respondents were asked to perform a variety of programs of aerobic exercise for 30 minutes five days a week. After a period of 20, 12 and 6 weeks of training, the majority of respondents indicated an increase in oxygen consumption during exercise. The amount of oxygen that is spent is a key indicator of aerobic exercise.

As many as 20 percent of respondents indicated an increase in oxygen levels of less than five percent or could be called no increase. Meanwhile, 30 percent showed no improvement in insulin sensitivity, which means that exercise does not reduce the risk of diabetes.

Another assessment is done is that muscle tissue samples to analyze the results showed there were 30 pairs of genes that predict an increase in oxygen intake. From the results of these tests 11 genes showed a special benefit to be gained from aerobic exercise.

As is known, the low number of maximal oxygen consumption be a marker of illness the person is vulnerable. Therefore, health experts recommend aerobic exercise is usually directly to increase oxygen capacity.

“Looking ahead, we hope that health experts recommend that before you do a sport or prevention is effective in maintaining health,” said Timmons.