Influence of accelerometer calibration approach on MVPA estimates for adults
ISPAH ePoster Library. Matthews C. Oct 16, 2018; 225411
Charles Matthews
Charles Matthews
Login now to access Regular content available to all registered users.
Abstract
Rate & Comment (0)
Abstract Purpose. To compare estimates of moderate-vigorous physical activity (MVPA) duration derived from accelerometers calibrated only to walking and running activities to estimates from calibrations based on a broader range of lifestyle and ambulatory activities. Methods. In a study of 932 older (50-74 yrs) adults we compared MVPA estimates from accelerometer counts based on three ambulatory calibration methods (Freedson 1952 counts/min (cpm); Sasaki 2690 cpm; activPAL 3+ METs) to estimates based on calibrations from lifestyle and ambulatory activities combined (Matthews 760 cpm; Crouter 3+ METs; Sojourn3x 3+ METs). We also examined data from up to 6 previous-day recalls describing the MVPA in this population. Results. MVPA duration values derived from ambulatory calibration methods were significantly lower than methods designed to capture a broader range of both lifestyle and ambulatory activities (p < 0.05). MVPA (hrs/d) estimates in all participants were: Freedson (median [inter-quartile range]=0.35 [0.17-0.58]); Sasaki (0.91 [0.59-1.32]); and activPAL (0.97 [0.71-1.26]) compared to Matthews (1.82 [1.37-2.34]); Crouter (2.28 [1.72-2.82]); and Sojourn3x (1.85 [1.42-2.34]). Recall-based estimates in all participants were comparable (1.61 [0.89-2.57]) and indicated participation in a broad range of lifestyle and ambulatory MVPA. Conclusion. Accelerometer calibration studies that employ only ambulatory activities may produce MVPA duration estimates that are substantially lower than methods calibrated to a broader range of activities. These findings highlight the potential to reduce differences among device-based measures of MVPA due to variation in calibration study design by including a variety of lifestyle and ambulatory activities.
    This eLearning portal is powered by:
    This eLearning portal is powered by MULTIEPORTAL
Anonymous User Privacy Preferences

Strictly Necessary Cookies (Always Active)

MULTILEARNING platforms and tools hereinafter referred as “MLG SOFTWARE” are provided to you as pure educational platforms/services requiring cookies to operate. In the case of the MLG SOFTWARE, cookies are essential for the Platform to function properly for the provision of education. If these cookies are disabled, a large subset of the functionality provided by the Platform will either be unavailable or cease to work as expected. The MLG SOFTWARE do not capture non-essential activities such as menu items and listings you click on or pages viewed.


Performance Cookies

Performance cookies are used to analyse how visitors use a website in order to provide a better user experience.


Save Settings