Measuring Physical Activity in a Cardiac Rehabilitation Population Using a Smartphone-Based Questionnaire
BackgroundQuestionnaires are commonly used to assess physical activity in large population-based studies because of their low cost and convenience. Many self-report physical activity questionnaires have been shown to be valid and reliable measures, but they are subject to mea...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
JMIR Publications
2013-03-01
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| Series: | Journal of Medical Internet Research |
| Online Access: | http://www.jmir.org/2013/3/e61/ |