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's fat so that it has energy stores to be used during long runs. running/cardio is fine but mix in resistance training. muscle burns more calories than fat. this doesn't mean you will get bulky if that's 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. don't waste your money on false promises. a registered dietician can help you with meal planning if you need it. hope this helps
despite regular cardio exercise and eating healthy i can't seem to lose weight? . okay maybe i can't lose weight is misleading but i am losing muscle and gaining fat. my exercise includes running for an hour at least four times a week for over a month and eating includes eating salads eggs fruits and white meats like chicken (and none of the junk i won't even allow myself cheat days). in spite of the fact that i have lost 20lbs i don't look any thinner. in fact i've gained fat and it's becoming increasingly harder to continue keep the same running time and pace.