[Galuf the Dwarf]

Look at it this way, DEV (you mind if I call you that for short?), I'm a naturally trim guy, though I don't have much of anything in the line of muscle, especially in the arms! I also burn food when I'm active like a match through a sheet of paper soaked in gasoline!

Anyhoo, walking can do quite a bit for you, especially if you do enough of it in a day (without hurting yourself) and doing such over months. For instance, you might want to try going for walks on actual terrain, like roads and hiking trails, if you can bare it. If your parents (or whoever you may go anywhere with) are cool with it, make them park a bit farther than usual in the parking lot of any building, so that you can get some more walking. When you build up enough walking endurance, you could possibly even walk for hours without getting tired or sore, under the right conditions!

You might also want to consider doing more rigorous activities around the house. Why don't you carry out stuff for your folks? Working hard requires quite a lot of energy, which may burn a lot of what you consume, and something more.

Still, you might want to heed these words the most:
- "No pain, no gain" doesn't mean that you should strain yourself. If you overdo, you're more likely to damage muscles than make them stronger or more enduring. Do enough so that you feel like you've worked your muscles, but not hurting them. Don't go for too long or too hard of a workout.

- The more you practice, the longer you can go with a workout over time. For instance, a 30-minute exercise could stretch into a 2-hour workout after a number of months of repeated 30-minute exercises.

- It takes determination to make something out of a workout routine. Keep to it, and overtime, you'll see results. Don't go for these commercials that promise results from their products in weeks or days; they're money traps. (Sure, at age 12, it may not be as big of a deal, but it's good advice for the future.)

- When you start to see results, the best plan is to discard what close you have that is too big at that point. Don't look back, because you're risking sliding back into old habits and ruining your long-toiled benefits. (My mother proved this advice earlier this year; she's struggled with her weight for years.)