| License: Creative Commons Attribution 4.0 PDF - Published Version (2MB) |
- URN to cite this document:
- urn:nbn:de:bvb:355-epub-365813
- DOI to cite this document:
- 10.5283/epub.36581
Abstract
Background: Widespread access to the Internet and an increasing number of Internet users offers the opportunity of using Web-based recalls to collect detailed physical activity data in epidemiologic studies. Objective: The aim of this investigation was to evaluate the validity and reliability of a computer-based 24-hour physical activity recall (cpar24) instrument with respect to the recalled ...

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