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| Sanya Richards |
Slate asked this question earlier in the week and came to
the conclusion that the hair shouldn't have an effect:
Still, even the most unruly hair is unlikely to make a major
difference. Imagine that you are a 400-meter sprinter who uses 10 percent of
your total energy battling air resistance. Imagine, too, that you increased
your total surface area by 10 percent (a generous assumption) by letting your
hair fly free. Drag and surface area are directly proportional—you can check
out the equation—so you would be increasing the force of air resistance by 10
percent by untying your ponytail. [...] You would need to exert 1 percent—10
percent of 10 percent—more effort with your hair down than with your hair up.
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