Our TG Caption

You decide to make it so that the faster she runs, the hornier she gets, and when she runs full pelt, she will have a constant orgasm that will go on until she has sat down for ten minutes. Every second it lasts, the orgasm gets twice as strong, but she is capable of fighting past it to win a race, so she will still be able to easily win every gold medal in the Olympics for athletics. As a bonus you add that a strong aphrodisiac is stored in her sweat, so when she runs, EVERYONE around her gets horny.