I was 38 inches at the waist and 104kg. Now I'm 32 inches, 85kg have little body fat left (lots of empty skin though), and can ride 100 miles in the weekend and still ride 30km every morning and commute on top of that. It just takes time. But when you get there.... the feeling is great. You also get to buy a whole new wardrobe of clothes. It is very nice never to be puffed or tired no matter how fast you walk.