@article{doi:10.1001/jama.2009.246,
title = {PRevalence of self-reported physically active adults—united states, 2007},
journal = {JAMA},
volume = {301},
number = {9},
pages = {926-927},
year = {2009},
doi = {10.1001/jama.2009.246},
URL = { + http://dx.doi.org/10.1001/jama.2009.246},
eprint = {/data/Journals/JAMA/4454/jwr0304_926_927.pdf}
}