Even better than pedalling away on a static exercise bag is getting out into the daylight and walking. I walk every day, even grey and overcast days, as long as it is not actually raining hard or snowing hard.
I don't take any supplements, just have a varied diet , eating all the four main food groups. I have never dieted, but I do eat small portions and if I want something between meals I eat a few almonds and raisins, or a piece of fruit. Since I started serious walking, I have lost two stone and about 5" off my waist and hips, dropping from size 18 trousers to 14.
Even if you live in an inner city, there is usually a park where you can walk and enjoy the different seasons.