It's not a matter of exercising, I'm already doing that quite frequently. However my appetite is uncontrollable, and without medication I get terrible hunger pains even if I've eaten a full sized meal. So with the stimulant, I'm able to not over eat since my appetite is virtually nonexistent now.
Also to preface this, I've had tons of problems with major depression since my early teens(puberty), so for the past 4-5 years, I've been pretty ignorant of my health and whatnot. I've just recently gotten into a stable condition, and now that I'm able to function in society normally I've been trying to lose weight by exercising/restricting my appetite; however considering my appetite had gotten used to a lot more food per meal than normal, it's difficult to keep yourself from eating too much. This is where the stimulant kicks in and helps me get a head start on getting back in shape.