There’s little to no evidence that cardio excerse leads to weight loss. Groups who restrict calorie intake alway out perform the exercise group in weight loss studies and there’s never any significant difference between 2 groups who both restrict calories but one exercises and the other does not.

It’s a fundamental misunderstanding of how we use glycogen for moving around and fat as an emergency reserve. If we remember that we evolved as persistence hunters, it starts to make more sense. I.E. what’s the point in putting on a layer of fat for a winter reserve, if you could accidentally run it off chasing down a meal? Those that could run it off chasing down a meal didn’t survive the hard winters and those that didn’t lived.

The whole idea that you could do cardio to lose weight was invented by food producers to make people think they could treat their diet like a credit card and payback overspending with exercise. That way, we would eat more and they would make more money. It’s also the reason it’s called cardiovascular exercise and not weight-loss excersise.