 [ Symptoms ] i have an uncomfortable feeling in my stomach on a daily basis now i will feel full for no reason [ Disease ] the body responds to what is known as the said principle specific adaptations to imposed demands when you look at marathon runners they are generally thin but actually have a higher body fat  than sprinters this is an adaptation when you run for long periods your body needs energy if your exercise program has no variation your body adapts and begins to hold on to it is fat so that it has energy stores to be used during long runs runningcardio is fine but mix in resistance training muscle burns more calories than fat this does not mean you will get bulky if that is a concern but by activating more muscle fibers your body will burn more calories helping to lose weight circuit training can be a useful tool for this you will burn a lot of calories your heart rate will get up and you will increase muscle the key is variation most personal trainers or at least good ones progress your workout through different stages to keep your body adapting using simple tools like exercise selection # of sets # of reps time of rest in between can all help one final piece of advice most supplements out there are junk do not waste your money on false promises a registered dietician can help you with meal planning if you need it hope this helps