AU  - Lee I
TI  - Dose-response relation between physical activity and fitness: Even a little is good; more is better
PT  - JOUR
DP  - 2007
TA  - JAMA
pages = {2137-2139},
VI  - 297
IP  - 19
AID  - 10.1001/jama.297.19.2137 [doi]
4100  - http://dx.doi.org/10.1001/jama.297.19.2137
SO  - JAMA May 16, 2007 297(19):2137