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Aug 30, 2021
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Why is obesity difficult to lose weight with exercise?

Exercise is an important part of the fight against obesity. They help waste energy and stimulate the breakdown of adipose tissue. However, the body “does not like” to part with fat, which, hypothetically, it may still need. In a new study, scientists have discovered another mechanism that explains why losing weight can be so difficult.

Previously, scientists were confident that all the calories that a person spent during exercise can be considered a pure achievement in the fight against obesity. However, new scientific work has shown that in response to burning energy, the body can respond with austerity. This can greatly affect the daily energy balance.

In the study, scientists analyzed data on energy consumption of 1,754 people, information about which was in the database of the International Atomic Energy Agency. They found that the increase in physical activity through exercise led the body to try to compensate for the waste of energy. To do this, he limited her spending at rest (he began to use fewer calories for various life processes).

If the fitness tracker shows you that you spent, for example, 300 kilocalories during exercise, then you would expect that this figure reflects the daily energy loss. Perhaps for a short period of time this is exactly the case. However, the body soon begins to conserve energy in other ways.

Study co-author Professor Lewis Halsey of Rowhampton University compared the body’s response to the actions of the government, which needs to balance the budget: if it spent more than planned at the beginning of the year, then it can cut costs.

Likewise, people who are trying to lose weight may find that at first they manage to get rid of those extra pounds, but soon plateau reads – there is no progress for weeks or months. One of the reasons for this is probably the described savings on the part of the body.

“Around the world, national guidelines recommend achieving an energy deficit of 500-600 calories per day for weight loss through exercise and diet. However, they do not take into account the reduction in the number of calories burned for the basic functions of the body, due to which is compensated for the energy spent on exercise, ”- said Helsey in a press release.

Research has shown that obese people are particularly keen to reduce resting energy expenditure. Scientists have calculated that when the final calculation of energy expenditure at the end of the day, it turns out that they lose only half of the calories that they burned during physical activity (the rest of the body manages to save). People with a normal weight lose about 72% of the calories burned during exercise during the day.

“Are these people getting heavier, in part because of greater energy compensation, or is energy compensation due to the fact that they weigh more? Of this we not know“, – reported Helsinki


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