Weight Management/Sports Health If exercise and fitness is your Jam, then the F15 is for you.For more information on theses systems and whether these are right for you, just click on the F15 button. F15 If your looking to drop a dress size or 2 before a wedding or just to feel more heathly, Then the C9 is for you.For more information on the C9, click the C9 button below. C9