I do one most often. I double if my shoe laces untie themselves throughout the day.
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I double knot them, because years ago during a PE class I had, they untied when I ran, so I went from single to double knot thereafter.
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When did velcro go out of style?????
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Once, loosely, and several months ago.
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I do the basic knot for my shoes then tie the two loops together.
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One most of the time, two if i am expecting trouble.
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twice