Effects of accelerometer-based sedentary time and physical activity on DEXA-measured fat mass in 6059 children

Andrew O. Agbaje (), Wei Perng and Tomi-Pekka Tuomainen
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Andrew O. Agbaje: University of Eastern Finland
Wei Perng: University of Colorado Anschutz Medical Campus
Tomi-Pekka Tuomainen: University of Eastern Finland

Nature Communications, 2023, vol. 14, issue 1, 1-17

Abstract: Abstract Globally, childhood obesity is on the rise and the effect of objectively measured movement behaviour on body composition remains unclear. Longitudinal and causal mediation relationships of accelerometer-based sedentary time (ST), light physical activity (LPA), and moderate-to-vigorous physical activity (MVPA) with dual-energy X-ray absorptiometry-measured fat mass were examined in 6059 children aged 11 years followed-up until age 24 years from the Avon Longitudinal Study of Parents and Children (ALSPAC), UK birth cohort. Over 13-year follow-up, each minute/day of ST was associated with 1.3 g increase in fat mass. However, each minute/day of LPA was associated with 3.6 g decrease in fat mass and each minute/day of MVPA was associated with 1.3 g decrease in fat mass. Persistently accruing ≥60 min/day of MVPA was associated with 2.8 g decrease in fat mass per each minute/day of MVPA, partly mediated by decrease insulin and low-density lipoprotein cholesterol. LPA elicited similar and potentially stronger fat mass-lowering effect than MVPA and thus may be targeted in obesity and ST prevention in children and adolescents, who are unable or unwilling to exercise.

Date: 2023
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DOI: 10.1038/s41467-023-43316-w

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