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Validating two self-report physical activity measures in middle-aged adults completing a group exercise or home-based

Nicole Freene1, Gordon Waddington2, Wendy Chesworth2

  • 1Faculty of Health, University of Canberra, ACT 2601, Australia.

Journal of Science and Medicine in Sport
|December 17, 2013
PubMed
Summary

Physical activity diaries require careful interpretation, especially in intervention studies. The Active Australia Survey (AAS) is a reliable self-report tool for middle-aged adults, showing good agreement with objective measures.

Keywords:
AccelerometerDiaryIntervention studyPhysical activityQuestionnaireValidation study

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Area of Science:

  • Exercise Science
  • Public Health
  • Gerontology

Background:

  • Accurate measurement of physical activity is crucial for evaluating interventions in middle-aged adults.
  • Self-report measures are commonly used but their validity compared to objective measures can vary.
  • Understanding the reliability of different physical activity assessment tools is essential for research and public health.

Purpose of the Study:

  • To compare the validity of physical activity diaries and the Active Australia Survey (AAS) against accelerometry in sedentary middle-aged adults undergoing physical activity interventions.
  • To determine the most reliable self-report method for assessing physical activity in this demographic.
  • To inform the choice of measurement tools in future physical activity intervention studies.

Main Methods:

  • A cross-sectional study involving 76 sedentary adults aged 50-65 years.
  • Participants were enrolled in either a group exercise (G) or home-based (HB) physical activity program for 6 months.
  • Objective physical activity was measured using accelerometry (ActiGraph GT1M) over 7 days, alongside self-reported data from the AAS and physical activity diaries.

Main Results:

  • Home-based participants reported significantly less moderate-to-vigorous physical activity in diaries compared to group exercise participants.
  • Fair-to-good agreement was found between physical activity diaries and accelerometry/AAS for home-based participants.
  • Group exercise participants' diary data showed poor correlation with objective measures, while AAS data demonstrated good correlation with accelerometry.

Conclusions:

  • Physical activity diaries should be used with caution, particularly when participants may not fully grasp physical activity intensity.
  • The Active Australia Survey (AAS) is recommended as a preferred self-report measure for middle-aged adults, irrespective of the intervention type.
  • These findings highlight the importance of selecting validated and reliable tools for physical activity assessment in intervention research.