It’s more about metabolic health rather than weight loss or gain. Mitochondria are the powerhouse of cellular biology and not having enough or poorly functioning mitochondria leads to all sorts of problems like inflammation and metabolic disorders like diabetes. A well functioning mitochondria should give more energy and better performance as well as better health.
Another name for leaf blowers is air brooms and air brooms are useful for big jobs. They now come as battery powered which is better on two fronts as they are quieter but more importantly they are not using 2 stroke motors. Apparently the 2 stroke is the most polluting of internal combustion engines whose design hasn’t really improved since they were first invented.