So how do foot control and a flapping old sole add up to injury-free legs? Because of one magic ingredient: fear. Contrary to what pillowy-sounding names like the Adidas MegaBounce would have you believe, all that cushioning does nothing to reduce impact. Logically that should be obvious—the impact on your legs from running can be up to twelve times your body weight, so it’s preposterous to believe a half inch of rubber is going to make a bit of difference against, in my case, 2,760 pounds of earthbound beef. You can cover an egg with an oven mitt before rapping it with a hammer, but that egg
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