Development of sedentary behavior across childhood and adolescence: longitudinal analysis of the Gateshead Millennium Study.
Xanne JanssenKay D MannLaura BasterfieldKathryn N ParkinsonMark S PearceJessica K ReillyAshley J AdamsonJohn J ReillyPublished in: The international journal of behavioral nutrition and physical activity (2016)
In this study, sedentary time was high and increased to almost 75% of waking hours at 15y. Sedentary behavior became substantially less fragmented as children grew older. The largest changes in sedentary time and sedentary fragmentation occurred between 9y to 12y, a period which spans the transition to secondary school. These results can be used to inform future interventions aiming to change sedentary behavior.