1. You have multiple pairs of one kind of running shoes.
2. You have bookmarked Strava and you have a premium account.
3. Your dresser or medicine cabinet has different bottle sizes (and brands) of petroleum jelly, insect repellant, and sunblock.
4. Your grocery list includes energy bars/gels, nuts, and baby food (even if you do not have a baby!).
5. You buy salt but not for cooking (and in larger amounts than a regular customer would).
6. The skin in your arms and between mid thigh and ankles is darker than the rest of your body. And the tan lines are pretty obvious.
7. Although not necessarily your favorite fruit, you eat banana whenever you can.
8. iRunFar.com is your porn site.
9. You have at least one dead toenail.
10. You do not make appointments on Saturdays, because that is reserved for your long runs.