Physical Exercise Does Not Contribute to Weight Loss - Large-Scale Study## Translation of the provided text from Russian to English.

Physical activity without changes in diet does not lead to weight loss - this is the conclusion reached by researchers from Bangor University (UK). Their work is published in the journal Applied Physiology, Nutrition, and Metabolism.

The study involved 70 women aged 18 to 32 years who were not trying to lose weight. They were divided into groups that engaged in intensive circuit training three times a week for 45-90 minutes over 4 and 8 weeks. The women did not change their diet, continuing to eat as usual. To avoid influencing the participants' behavior, they were told that the goal of the program was to improve heart function.

The results showed that physical activity did not lead to weight loss, even in women with excess body weight. The only noticeable change was an increase in muscle mass in lean participants.

Scientists explain this by the fact that after workouts, most women experienced increased appetite, and the body compensated for the calories expended by increasing food consumption. This is confirmed by changes in the levels of hormones responsible for feelings of hunger and satiety.

"Our body is designed to maintain weight, not lose it - this is a legacy of evolution, when food was scarce," explained study author Hans Peter Kubis in an article for The Conversation.