?:definition
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International Physical Activity Questionnaire (October 2002) Long Last 7 Days Self-Administered Format (IPAQ-LF SELF-ADMINISTERED VERSION) (Booth, M.L. (2000). Assessment of Physical Activity: An International Perspective. Research Quarterly for Exercise and Sport, 71 (2): s114-20. Retrieved from the International Physical Activity Questionnaire website: http://www.ipaq.ki.se).
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