What physical activity surveillance needs: validity of a single-item questionnaire | British Journal of Sports Medicine

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What physical activity surveillance needs: validity of a single-item questionnaire

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Cite this article as:: Wanner M, Probst-Hensch N, Kriemler S, et al

What physical activity surveillance needs: validity of a single-item questionnaire

British Journal of Sports Medicine 2014;48:1570-1576.