You manipulate your birth control pills a bit so that time of the month doesn't coincide with race days

You own more sports bras than everyday bras

You own 5 one-piece swimsuits, and only one bikini

Your chosen hairstyle has more to do with what is easiest under a swim cap or aero helmet than what is fashionable

You don't wear heels because they are not good for your calves

You can't wear Lululemon because your muscled thighs rub together ;-)

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maybe she's born with it, maybe it's chlorine
If you're injured and need some sympathy, PM me and I'm very happy to write back.
disclaimer: PhD not MD