Children's physical activity and sedentary time compared using assessments of accelerometry counts and muscle activity level

PeerJ
Ying GaoTaija Finni

Abstract

This research compared accelerometry (ACC)-derived and muscle electromyography (EMG)-based estimates of physical activity (PA) and sedentary time in typical PA tasks and during the daily lives of children. Data was included from two exploratory studies. In Study I, 6-7-year-old children (n = 11, 64% girls) were assessed for eight PA tasks (walking, stair negotiation, climbing, crawling, swinging, balancing, trampoline jumping and a game of tag). In Study II, 7-9-year-old children (n = 14, 38% girls) were assessed for six PA tasks (walking, sitting, static squat, single leg hops, jump for height and standing long jump), and daily PA during one day with and one day without structured exercise. Quadriceps and hamstring muscle activity and inactivity using EMG shorts and acceleration by waist-mounted accelerometer were simultaneously measured and classified as sedentary, light, moderate and vigorous activity. Data from ACC was further analyzed using five different published cut-off points and varying time windows (1-60 s) for comparison with EMG. In the PA tasks ACC counts and EMG amplitude showed marked differences in swinging, trampoline jumping, crawling, static squat, single leg hops, standing long jump and jump for height, the...Continue Reading

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Citations

Jun 7, 2019·International Journal of Environmental Research and Public Health·Donna NiemistöArja Sääkslahti
Feb 19, 2021·European Journal of Sport Science·Eero A HaapalaTimo A Lakka
Jul 31, 2021·Sports Medicine - Open·Isabelle SchöfflVolker Schöffl

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Software Mentioned

ActiGraph
MATLAB
SPSS

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