“Exercise is a important but not necessary to lose the weight.”
Exercise does more than burn calories!
I would also note that, for me at least, its much easier to stick with a healthy diet if I'm also exercising regularly. I'm just not as inclined to munch or snack between meals.
Agreed. But be careful. An overweight, obese, person running can be harmful to them (their joints). Injuries are very likely to happen.
I used to run distance in High School and was a bean pole. My metabolism has changed and I can no longer maintain a low weight by exercising. It is impossible. Besides, massive amounts of exercise is not healthy for older folks.