I would say genes play a major role in losing weight, and so a one size fits all probably would not be the answer as far as losing weight. You may have to change the intensity or frequency of your workout, if you are not getting any results. If you are running a lot and not seeing any results, you may want to change your workout to some weight training. It may take awhile to find out what works for you with the trial and error method- and this would be the best way to find out what works best for your body type.