There's one thing that's always bound to get you into shape, and that's joining the military when you leave school. The military performs a brave and important role, and they have to be in excellent physical shape to do it. That means going through a lot of very strenuous and difficult training, but the end results are always worth it. If you don't believe us, just take a look at these pictures!
The boy on the left isn't dramatically out of shape - he's just carrying a little bit of extra weight, and he hasn't fully grown into his body yet. Four years later, having joined the navy, he's in the shape of his life. In case you can't tell, he's the one on the right. You can tell just by looking at his expression that it's done wonders for how he feels about himself - there's a lot of confidence in those eyes.