On the cycling side, I'd have to disagree. It's one type of exercise you can get into while being very overweight: the gearing means you can start out really g

On the cycling side, I'd have to disagree. It's one type of exercise you can get into while being very overweight: the gearing means you can start out really gently and very gradually work up over time. You can start out pottering around short distances at a very slow pace without it being too stressful. I have a friend who was unhealthily obese who started cycling, and in a year they were utterly transformed. To the point they could actually enter cycling races. And they were healthier in both mind and body--looked very healthy, and noticeably changed positive outlook. Diet is definitely important for sure, but so is exercise. Diet is controlling what's going into your body. Exercise will improve your body's metabolism, and have a host of other benefits.