International physical activity questionnaire: 12-country reliability and validity.
Bassett
David R
DR
University of Tennessee, Knoxville, TN, USA.
D015444:Exercise; D014943:Global Health; D015438:Health Behavior; D006801:Humans; D007391:International Cooperation; D009043:Motor Activity; D011159:Population Surveillance / Q000379:methods*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires