Fitness classes do not always help you lose weight.
Scientists have found that the body adapts to stress, and over time calories are burned less actively.
Research shows that people who are active burn only slightly more calories than those who are sedentary.

This happens because the body begins to save energy on digestion and other processes.
Some people eat a lot after training, and this reduces their efforts to zero.
Scientists emphasize that metabolism does not depend on gender or age.
Therefore, to lose weight, training in the gym alone is not enough.
You also need to monitor your diet and lifestyle in general.