The Associations of Youth Physical Activity and Screen Time with Fatness and Fitness: The 2012 NHANES National Youth Fitness Survey

• Yang Bai ,

  Contributed equally to this work with: Yang Bai, Senlin Chen

  * E-mail: ybai@iastate.edu

  Affiliation Department of Kinesiology, Iowa State University, Ames, Iowa, United States of America

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• Senlin Chen ,

  Contributed equally to this work with: Yang Bai, Senlin Chen

  Affiliation Department of Kinesiology, Iowa State University, Ames, Iowa, United States of America

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• Kelly R. Laurson ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation School of Kinesiology and Recreation, Illinois State University, Normal, Illinois, United States of America

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• Youngwon Kim ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation MRC Epidemiology Unit, University of Cambridge, Cambridge, United Kingdom

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• Pedro F. Saint-Maurice ,

  ¶‡ These authors also contributed equally to this work.

  Affiliation Department of Kinesiology, Iowa State University, Ames, Iowa, United States of America

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• Gregory J. Welk

  ¶‡ These authors also contributed equally to this work.

  Affiliation Department of Kinesiology, Iowa State University, Ames, Iowa, United States of America

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