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What's harder: giving birth or training for the Olympics?

That's what Jenna Lee asked Olympic hopeful and new mom Sarah Brown today on "Happening Now."

Brown, who gave birth to a beautiful baby girl on March 4, didn't let the pregnancy interrupt the grueling training she has been doing in preparation for the 1,500-meter run at July's U.S. Olympic Trials.

She said that she hadn't expected the pregnancy, so it was challenging to find a workout routine to keep her in tip-top shape as her due date - and the Olympic Trials - rapidly approached.

She explained that her body was so accustomed to rigorous workouts that she thought it would actually be more detrimental to her and her baby's health if she suddenly cut back on her training.

"My running actually got better during the third trimester, but it was a lot more uncomfortable," Brown said.

Jenna, who is expecting her next child any day now, asked the new mom how labor compares to training for the Olympics.

See Brown's answer in the "Happening Now" interview above.

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