We all occupy them,and most of us just ignore them. I'm talking about that extra pair of holes on the top of our sneakers. Nope, they're not just for decoration! Try this shoelace tying trick called the "heel lock" to prevent the back of your foot from sliding up and down, and which will prevent heel blisters. If you're a runner,this just may be the best thing you hear all day!
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Source: popsugar.com