One, it's impossible to "spot reduce." While you can target certain areas of your body in terms of building up the muscles in that area, you can't decide to just lose weight in your stomach, or your thighs, or your rear. It doesn't work that way. You can't remove subcutaneous body fat from specific areas of the body by doing exercises that target those areas. Doing hundreds of crunches will certainly strengthen your abs, but that won't reduce the amount of fat stored in your torso.
Here's something else most people probably don't know: Fidgeting is good for you. It's considered a nonexercise physical activity, and it's an important way to burn energy. You get more health benefits if, in addition to exercising, you are a more fidgety, more active person the rest of the day. This means gesturing while you're talking, tapping your foot, just moving around.