Association between Self-Reported and Accelerometer-Based Estimates of Physical Activity in Portuguese Older Adults.

Célia Domingos,Nadine Correia Santos,José Miguel Pêgo

doi:10.3390/s21072258

Célia Domingos, Nadine Correia Santos + Show 1 more

Open Access

https://doi.org/10.3390/s21072258

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Abstract

Accurate assessment of physical activity (PA) is crucial in interventions promoting it and in studies exploring its association with health status. Currently, there is a wide range of assessment tools available, including subjective and objective measures. This study compared accelerometer-based estimates of PA with self-report PA data in older adults. Additionally, the associations between PA and health outcomes and PA profiles were analyzed. Participants (n = 110) wore a Xiaomi Mi Band 2® for fifteen consecutive days. Self-reported PA was assessed using the International Physical Activity Questionnaire (IPAQ) and the Yale Physical Activity Survey (YPAS). The Spearman correlation coefficient was used to compare self-reported and accelerometer-measured PA and associations between PA and health. Bland–Altman plots were performed to assess the agreement between methods. Results highlight a large variation between self-reported and Xiaomi Mi Band 2® estimates, with poor general agreement. The highest difference was found for sedentary time. Low positive correlations were observed for IPAQ estimates (sedentary, vigorous, and total PA) and moderate for YPAS vigorous estimates. Finally, self-reported and objectively measured PA associated differently with health outcomes. Summarily, although accelerometry has the advantage of being an accurate method, self-report questionnaires could provide valuable information about the context of the activity.

Highlights

The results have shown a significant difference in physical activity (PA) measured by International Physical Activity Questionnaire (IPAQ) between gender for domestic activities, sitting time, moderate activities, and total PA (Table 2), with higher values for women
Accurate assessment of PA is crucial for quality research across the public health and exercise science fields, with repercussions in the clinic
In line with previous findings [14,21,44,53], low positive correlation coefficients were observed for IPAQ estimates and moderate positive correlation for Yale Physical Activity Survey (YPAS) estimates of vigorous PA (r = 0.42, p < 0.001)

Summary

Introduction

Regular physical activity (PA) is essential for healthy aging and chronic disease prevention, with its benefits on general health and overall quality of life in older adults being well established [1,2]. PA contributes to maintaining physical function and performance (e.g., walking speed, handgrip strength) [3] and plays a preventing role in frailty and falls [4,5]. It associates with more favorable body composition and anthropometric parameters such as body mass index (BMI), waist circumference, and weight [6]. The quantification of the strength and nature of the relationship between PA and health outcomes should rely on the accurate measurement of PA behavior [8]

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