Establishing the relevance of psychological determinants regarding physical activity in people with overweight and obesity

C. Lugones-Sanchez*, R. Crutzen, J.I. Recio-Rodriguez, L. Garcia-Ortiz

*Corresponding author for this work

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Background/Objective: To identify the most relevant determinants involved in Physical Activity (PA) changes in the EVIDENT 3 study population, measured by the International PA Questionnaire (IPAQ) and the Actigraph GT3X accelerometer.Method: Exploratory study. Data used were collected from EVIDENT 3 study (N = 650). Items to measure psychological determinants were chosen from the baseline questionnaires. PA minutes/week were assessed by an accelerometer and IPAQ. The sample was analyzed by the control group (CG), the intervention group (IG) and Body Mass Index, using Confidence Interval-Based Estimation of Relevance (CIBER) analyses. Results: 486 participants, (IG: n = 251, CG: n = 235) were included. IG shows a positive association between PA assessed by accelerometer and self-efficacy. In IG, the overweight sample shows a positive association between PA assessed by accelerometer and motivation and self-efficacy. PA assessed by accelerometer obtained a higher explained variance (R-2) in IG, both people with overweight (.10 - .55) and obesity (.03 - .19). In CG, IPAQ reached better results in people with overweight (.12 - .49). Conclusions: Motivation and self-efficacy showed as relevant in increasing PA minutes/week, but only in the people with overweight in IG. There might be other factors not analyzed that could improve the low R-2 obtained. (C) 2021 Asociaci ' on Espanola de Psicologia Conductual. Published by Elsevier Espana, S.L.U. This is an open access article under the CC BY license ( 0/).
Original languageEnglish
Article number100250
Number of pages11
JournalInternational Journal of Clinical and Health Psychology
Issue number3
Publication statusPublished - 1 Sep 2021


  • Physical activity
  • Accelerometry
  • Motivation
  • Obesity
  • Experiment

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