
By exercising you build muscle, which takes up less space in your body than the fat, so you look much smaller, though it may actually take a while to
lose the
weight... remember a pound is a pound, so replacing a pound of
fat, with a pound of muscle will leave you weighing the same for a while, but then muscle burns fat, so eventually, you'll start losing weight.
Check your measurements before you start exercising and check them periodically to track your progress.