From guest blogger Nirvi Shah:

Remember how First Lady Michelle Obama was trying to break a world record about jumping jacks?

She did it.

The goal was to break the Guinness World Record for the most people doing jumping jacks in a 24-hour stretch, which until today stood at 20,425. She incorporated the goal into her Let’s Move! campaign, an effort to end the childhood obesity epidemic within a generation.

On Oct. 12, Mrs. Obama gathered with a few hundred D.C. school children to get the record-breaking going. They did jumping jacks on the White House lawn.

In a brief video on the Let’s Move! website, Mrs. Obama said more than 300,000 people did jumping jacks to contribute to breaking the record.

“That’s 300,000 people getting their hearts thumping and their bodies moving... to make history,” she said.