In January, 2013, the American Academy of Pediatrics released the policy statement on recess, which Dr. R co-authored with Dr. Bob Murray.
For school implications about recess, read the research in the November, 2010 issue of Journal of School Health.
Check out the buzz from the media:
WGN Radio (for this one, click on the little arrow, to play the podcast)
Chicago Public Schools (from the Tribune, May 23, 2011)