physical activity measure Reliability and validity

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“How many times per week?” -. Energy expenditure measured by the Paffenbarger physical activity index questionnaire r=0.57. Maximal oxygen uptake r=0.46.
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Reliability and validity testing of a single-item physical activity measure K Milton, F C Bull and A Bauman Br J Sports Med published online May 19, 2010

doi: 10.1136/bjsm.2009.068395

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References

This article cites 21 articles, 8 of which can be accessed free at: http://bjsm.bmj.com/content/early/2010/07/23/bjsm.2009.068395.full.html#ref-list-1

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