People will consume a certain amount of fat during exercise. According to this calculation, people will definitely lose a few pounds!
As for why you didn't lose weight, it may be that your method is wrong. You must have added too many calories before you left, or you just walked slowly during exercise and didn't consume the calories in your body, so there is no reason to lose weight!
But in the process of your persistence, there must be a fitness effect!
I wish you happy every day.
Personal opinion, hope to adopt!