I have a serious problem with my bum.?

When running on a track, in a long distance event, especially at practice, for the first 100 m, just nonstop farting?It just keeps comin', and your teammates can hear ya, and you try to squeeze your cheeks together, but it slows you down? And these farts, they, are like rolling thunder.How can I make this go away? - my sister, cat.