FILE - In this Dec. 11, 2012 file photo, students hold their position during a yoga class at Capri Elementary School in Encinitas, Calif. Reading, writing, `rithmetic _ and PE? The prestigious Institute of Medicine is recommending that schools provide opportunities for at least 60 minutes of physical activity each day for students and treat physical education as a core subject. The report says only about half of the nation's youngsters are getting at least an hour of vigorous or moderate physical activity every day. (AP Photo/Gregory Bull, File)

Associated Press
FILE - In this Dec. 11, 2012 file photo, students hold their position during a yoga class at Capri Elementary School in Encinitas, Calif. Reading, writing, `rithmetic _ and PE?  The prestigious Institute of Medicine is recommending that schools provide opportunities for at least 60 minutes of physical activity each day for students and treat physical education as a core subject. The report says only about half of the nation's youngsters are getting at least an hour of vigorous or moderate physical activity every day.  (AP Photo/Gregory Bull, File)
FILE - In this Dec. 11, 2012 file photo, students hold their position during a yoga class at Capri Elementary School in Encinitas, Calif. Reading, writing, `rithmetic _ and PE? The prestigious Institute of Medicine is recommending that schools provide opportunities for at least 60 minutes of physical activity each day for students and treat physical education as a core subject. The report says only about half of the nation's youngsters are getting at least an hour of vigorous or moderate physical activity every day. (AP Photo/Gregory Bull, File)
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