Genetics do play a huge role when looking at weight loss. With that being said your genetics do not completely determine your outlook on weight loss. You are able to stay in shape no matter what your genetics may say. A huge part in this is exercising. You should exercise at least 30 minutes a day, for 5 days a week. When you are getting exercise that is regular and consistent you are also keeping your body in shape whether you are trying to lose weight or not.