I do walk around 1.5 hours a day, it definitely helps !
If you are really hungry but you think you should stop I recommend 1-2 portion of grapes. They do have calories but it fills you its also healthy .
I love them, its also said it helps to lose weight. I cant comment on that thought, but I did lose weight walking. Its not stressful , its enjoy able. Just take your dog for a walk, or take your camera and take pictures meawhile like I do. Very enjoyable !