Michelle Obama

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FILE - In this Feb. 25, 2014 file-pool photoFirst lady Michelle Obama speaks in Miami. Michelle Obama plans a weeklong solo visit to China this month that includes meetings with China’s first lady and high school and university students. It will be her first visit ever to the Asian economic powerhouse. In an announcement Monday on the White House blog, the first lady says a China visit is important because it is the most populous country in the world, with more than 1.3 billion people, and plays an important role on the world stage. (AP Photo/Joel Auerbach, File)

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President Obama and Vice President Joseph R. Biden exercise at the White House as part of First Lady Michelle Obama's "Let's Move!" campaign.

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First lady Michelle Obama and a young boy shows off their muscles as they eat healthy snacks during a visit to La Petite Academy in Bowie, Md., Thursday, Feb. 27, 2014, to promote healthy environments and encouraging healthy habits at preschools as part of her Let's Move! Child Care program. (AP Photo/Carolyn Kaster)

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First lady Michelle Obama eats healthy snacks with children during a visit to La Petite Academy in Bowie, Md., Thursday, Feb. 27, 2014, to promote healthy environments and encouraging healthy habits at preschools as part of her Let's Move! Child Care program. (AP Photo/Carolyn Kaster)

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First lady Michelle Obama exercises and dances with the Super Sprowtz during a visit to La Petite Academy in Bowie, Md., Thursday, Feb. 27, 2014, to show and talk about healthy environments and encouraging healthy habits at preschools as part of her Let's Move! Child Care program. (AP Photo/Carolyn Kaster)

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First lady Michelle Obama talks to the kids after they exercised and danced with the Super Sprowtz during a visit to La Petite Academy in Bowie, Md., Thursday, Feb. 27, 2014, to promote healthy environments and encouraging healthy habits at preschools as part of her Let's Move! Child Care program. (AP Photo/Carolyn Kaster)

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First lady Michelle Obama exercises and dances with the Super Sprowtz during a visit to La Petite Academy in Bowie, Md., Thursday, Feb. 27, 2014, to show and talk about healthy environments and encouraging healthy habits at preschools as part of her Let's Move! Child Care program. (AP Photo/Carolyn Kaster)

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First lady Michelle Obama exercises and dances with the Super Sprowtz during a visit to La Petite Academy in Bowie, Md., Thursday, Feb. 27, 2014, to promote healthy environments and encouraging healthy habits at preschools as part of her Let's Move! Child Care program. At left is trainer Roger Hanson. (AP Photo/Carolyn Kaster)

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First lady Michelle Obama eats healthy snacks with children during a visit to La Petite Academy in Bowie, Md., Thursday, Feb. 27, 2014, to promote healthy environments and encouraging healthy habits at preschools as part of her Let's Move! Child Care program. (AP Photo/Carolyn Kaster)

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First lady Michelle Obama high-fives children after exercising and dancing with the Super Sprowtz during a visit to La Petite Academy in Bowie, Md., Thursday, Feb. 27, 2014, to show and talk about healthy environments and encouraging healthy habits at preschools as part of her Let's Move! Child Care program. (AP Photo/Carolyn Kaster)