@article{doi:10.1001/archpediatrics.2010.252,
author = {Leek D and Carlson JA and Cain KL and et al},
title = {PHysical activity during youth sports practices},
journal = {Archives of Pediatrics & Adolescent Medicine},
volume = {165},
number = {4},
pages = {294-299},
year = {2011},
doi = {10.1001/archpediatrics.2010.252},
URL = { + http://dx.doi.org/10.1001/archpediatrics.2010.252},
eprint = {/data/Journals/PEDS/9298/poa05109_294_299.pdf}
}