Thomas is a sprinter, which involves a very different training regiment compared to other runners.
"We don't get a lot of mileage in," she said on TODAY Aug. 13.
When asked if she's ever ran a marathon, Thomas said: "No, the furthest I will run is one mile."
"We do a mile in the fall. It's a gut check. We do it to tap into your mental side: 'Can you finish a mile?'" she said. "It's really difficult for us."