1.Replacing school and out-of-school sedentary behaviors with physical activity and its associations with adiposity in children and adolescents: a compositional isotemporal substitution analysis.
Aleš GÁBA ; Jan DYGRÝN ; Nikola ŠTEFELOVÁ ; Lukáš RUBÍN ; Karel HRON ; Lukáš JAKUBEC
Environmental Health and Preventive Medicine 2021;26(1):16-16
BACKGROUND:
Little is known on how context-specific sedentary behaviors (SB) affect adiposity. This study aimed to investigate compositional associations between context-specific SB and adiposity and estimate the differences in adiposity associated with replacing school and out-of-school SB with physical activity (PA).
METHODS:
This study included 336 children and adolescents. Time spent in SB and PA was estimated using multi-day 24-hour raw accelerometer data. SB and PA were specified for school and out-of-school times. Fat mass percentage (FM%) and fat mass index (FMI) were used as adiposity indicators. A compositional isotemporal substitution model was used to estimate differences in adiposity associated with one-to-one reallocations of time from context-specific SB to PA.
RESULTS:
Participants spent approximately two thirds of their school and out-of-school time being sedentary. Relative to the remaining 24-h movement behaviors, significant associations between out-of-school SB and adiposity were found in both boys (β
CONCLUSIONS
A reduction of out-of-school SB in favor of light PA should be advocated as an appropriate target for interventions and strategies to prevent childhood obesity.
Accelerometry
;
Adiposity
;
Adolescent
;
Child
;
Czech Republic
;
Exercise
;
Female
;
Humans
;
Male
;
Schools
;
Sedentary Behavior