C'mon now. If you want to get sculpted and in-shape then you need to train like an athlete. Let's be honest: Generally speaking the most overweight individuals are on the aerobic equipment, while the most in-shape individuals are moving weights. This is not by accident. Recent studies have consistently shown that by increasing the intensity of your workout you can burn up to 10-15% more calories within a day than you would if you just "took a Sunday stroll".
Now, I'm not saying that long slow distance or walking is bad. I'm saying that if you want a hard, sculpted body, then you're going to have to force your body to adapt - lift something heavy many times!
Learn how to lift weights properly. Take initiative in your own health. Take your workouts to the next level.
Increase your intensity!