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Open AccessJournal ArticleDOI

Limits to the measurement of habitual physical activity by questionnaires

R J Shephard
- 01 Jun 2003 - 
- Vol. 37, Iss: 3, pp 197-206
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TLDR
Despite extensive use over 40 years, physical activity questionnaires still show limited reliability and validity and attempts at detailed interpretation in terms of exercise dosage and the extent of resulting health benefits seem premature.
Abstract
Despite extensive use over 40 years, physical activity questionnaires still show limited reliability and validity. Measurements have value in indicating conditions where an increase in physical activity would be beneficial and in monitoring changes in population activity. However, attempts at detailed interpretation in terms of exercise dosage and the extent of resulting health benefits seem premature. Such usage may become possible through the development of standardised instruments that will record the low intensity activities typical of sedentary societies, and will ascribe consistent biological meaning to terms such as light, moderate, and heavy exercise.

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Citations
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A comparison of direct versus self-report measures for assessing physical activity in adults: a systematic review

TL;DR: The findings suggest that the measurement method may have a significant impact on the observed levels of physical activity, which poses a problem for both reliance on self- report measures and for attempts to correct for self-report – direct measure differences.
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Global Physical Activity Questionnaire (GPAQ) : nine country reliability and validity study

TL;DR: GPAQ provides reproducible data and showed a moderate-strong positive correlation with IPAQ, a previously validated and accepted measure of physical activity, indicating that it is a suitable and acceptable instrument for monitoring physical activity in population health surveillance systems.
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Development of the world health organization global physical activity questionnaire (gpaq)

TL;DR: GPAQv2 is a suitable physical activity surveillance instrument for developing countries and enables countries to follow trends over time, understand regional and global comparisons, and better inform physical activity policy decisions.
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Systematic review of reviews of intervention components associated with increased effectiveness in dietary and physical activity interventions

TL;DR: This comprehensive review of reviews identifies specific components which are associated with increased effectiveness in interventions to promote change in diet and/or physical activity to maximise the efficiency of programmes for diabetes prevention.
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Physical activity for health: What kind? How much? How intense? On top of what?

TL;DR: Emerging evidence that light activities have health benefits and with advances in tools for measuring activities of all intensities, it may be time to shift to zero activity as the conceptual starting point for study.
References
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TL;DR: An alternative approach, based on graphical techniques and simple calculations, is described, together with the relation between this analysis and the assessment of repeatability.
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A Coefficient of agreement for nominal Scales

TL;DR: In this article, the authors present a procedure for having two or more judges independently categorize a sample of units and determine the degree, significance, and significance of the units. But they do not discuss the extent to which these judgments are reproducible, i.e., reliable.
Book

ACSM's guidelines for exercise testing and prescription

TL;DR: In this paper, the authors discuss the benefits and risks associated with physical activity and propose a general principles of exercise prescription for healthy populations with special consideration and environmental consideration, as well as a prescription for patients with chronic diseases and health conditions.
Journal ArticleDOI

Statistical methods for assessing agreement between two methods of clinical measurement

TL;DR: In this article, an alternative approach, based on graphical techniques and simple calculations, is described, together with the relation between this analysis and the assessment of repeatability, which is often used in clinical comparison of a new measurement technique with an established one.
Journal Article

Physical activity, exercise, and physical fitness: definitions and distinctions for health-related research.

TL;DR: These definitions are offered as an interpretational framework for comparing studies that relate physical activity, exercise, and physical fitness to health.
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