1870-7203 1870-7203 S1870-72032016000400235 México México México Mexico 00 12 2016 00 12 2016 14 4 235 239

2014 13 541-7 2011 197 961-7 2002 2 2002 2002 351-6 1996 38 44-50 1991 73 640-3 1997 22 983-9 2005 3 103-7 2006 17 391-419 2013 28 846-52 2008 33 2012-6 1981 5 184-9 1966 97 135-40 2009 14 427-32 2007 7 682-8 2007 21 204-11 American Academy of Pediatrics Committee on Sports Medicine and Fitness 1995 96 151-4