I'm 5'8 and walk for exercise about 2-3 hours a day so I've got quite a bit of lower body muscle. I'm around 155lbs and a size 8. I've been trying to get down to 150 with an ultimate goal of 145 but it's incredibly difficult to lose that weight. I think because of the muscle. I start doing more physical activity in an effort to burn calories and I just gain more muscle. I restrict my calories for a few days and my cravings ramp up fast.