KRASNAYA POLYANA, Russia -- The top U.S. Olympic women's bobsled sustained damage to its front end at after a fast training run Saturday.

Elana Meyers and brakeman Lauryn Williams completed their practice run down the Sanki Sliding Center course in 57.50 seconds - 0.34 seconds faster than any other sled - before banging a wall in the outrun. The pair did not take their second run so mechanics could fix the BMW-designed sled.

On Friday, Meyers crashed the sled at the bottom of the course on her first run. She and alternate brakeman Katie Eberling were uninjured and made a second run in USA-1 without incident, posting one of the session's fastest times.

USA-2 driver Jamie Greubel and alternate brakeman Kristi Koplin had the best time (58.13 seconds) in Saturday's second training run.

The women's competition begins Tuesday with two runs.

Myers says the Winter Olympics in Sochi has been "the most difficult athletic experiences" of her life.

In aFacebook postSaturday she wrote:

This Olympics has been the most difficult athletic experiences of my life. I've been beaten up physically, mentally, and emotionally. I don't say that for sympathy- I say it because I know that everything is worth it for the less than 4 minutes I will race on ice. I love sliding so much and I'm so excited to represent my country on the world's biggest stage! Any adversity I face is well worth it for those 4 runs! Can't wait until Tuesday!

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