There are currently no studies available reporting intervention effects on breaking up children’s sedentary time. This study examined the UP4FUN intervention effect on objectively measured number of breaks in sedentary time, number of sedentary bouts (> 10 mins) and total and average amount of time spent in those sedentary bouts among 10- to 12-year-old Belgian children. The total sample included 354 children (mean age: 10.9 ± 0.7 years; 59% girls) with valid ActiGraph accelerometer data at pre- and posttest. Only few and small intervention effects were found, namely on total time spent in sedentary bouts immediately after school hours (4-6PM; β = -3.51mins) and on average time spent in sedentary bouts before school hours (6-8.30AM; β = -4.83mins) and immediately after school hours in favor of children from intervention schools (β = -2.71mins). Unexpectedly, girls from intervention schools decreased the number of breaks during school hours (8.30AM-4PM; β = -23.45breaks) and increased the number of sedentary bouts on a weekend day (β = +0.90bouts), whereas girls in control schools showed an increase in number of breaks and a decrease in number of bouts. In conclusion, UP4FUN did not have a consistent or substantial effect on breaking up children’s sedentary time and these data suggest that more intensive and longer lasting interventions are needed.
Verloigne, Maes, Cardon, and De Bourdeaudhuij are with Dept. of Movement and Sport Sciences, and Van Lippevelde and Maes the Dept. of Public Health, Ghent University, Ghent, Belgium. Ridgers is with the Centre for Physical Activity and Nutrition Research, Deakin University, Melbourne, Victoria, Australia. Chinapaw and Altenburg are with the Dept. of Public and Occupational Health and the EMGO Institute for Health & Care Research, and Brug the Dept. of Epidemiology and Biostatistics and the EMGO Institute for Health & Care Research, VU Medical Centre, Amsterdam, Netherlands. Bere is with the Dept. of Public Health, Sport and Nutrition, University of Agder, Kristiansand, Norway.