Conclusions Multicomponent interventions which also include the use of st and ing desks may be an effective method for reducing  children 's sedentary time  in a school-based intervention .
Introduction Prolonged , uninterrupted periods of sedentary time may be associated with increased risk of Type II diabetes , cardiovascular disease and all-cause mortality even if the minimum recommended levels of daily physical activity are achieved .
It is reported that children spend approximately 80 % of their day engaged in sedentary behaviours .
Since children spend a large portion of their waking time at school , school-based interventions targeting excessive or interrupted periods of sedentary time have been investigated in a number of studies .
However , results of the effectiveness of studies to- date have been inconsistent .
Aim To conduct a systematic review to evaluate the effectiveness of school-based interventions design ed to reduce sedentary behaviour on objective ly measured sedentary time in children .
The effect of a healthy lifestyle programme on 8–9 year olds from social disadvantage
Aims This study assessed the efficacy of a school-based healthy lifestyle intervention ( Sport for LIFE ) for increasing physical activity , decreasing sedentary behaviour , reducing screen time behaviour , encouraging healthy attitudes and behaviour to nutrition , and reducing body mass index ( BMI ) in 8–9-year-old primary school children from lower socioeconomic background s in Northern Irel and . Methods A non-r and omised controlled trial of 416 children from 24 schools took part . Schools were r and omly assigned to one of two groups , an intervention or control group with 12 schools in each group . The intervention group received a 12-week school-based programme based on social cognitive theory . At baseline and follow-up , groups completed question naires assessing physical activity , screen time behaviour and dietary patterns . On each occasion anthropometric assessment  s of height and weight were taken . Physical activity and sedentary behaviour were measured by accelerometry . Results Significant effects were observed for vigorous , moderate and light activity for the intervention group at follow-up . Sedentary behaviour was significantly reduced for the intervention group but not for the control group . No significant effects of the intervention on BMI , screen time behaviour or attitudes to nutrition , with the exception of non-core foods , were shown . Conclusions The programme was effective in increasing physical activity and reducing sedentary behaviour , however no significant changes in screen time behaviour and attitude to nutrition , with the exception of non-core foods , were observed . Future research ideas are offered for tackling low levels of physical activity in children
Conclusions Multicomponent interventions which also include the use of st and ing desks may be an effective method for reducing  children 's sedentary time  in a school-based intervention .
Introduction Prolonged , uninterrupted periods of sedentary time may be associated with increased risk of Type II diabetes , cardiovascular disease and all-cause mortality even if the minimum recommended levels of daily physical activity are achieved .
It is reported that children spend approximately 80 % of their day engaged in sedentary behaviours .
Since children spend a large portion of their waking time at school , school-based interventions targeting excessive or interrupted periods of sedentary time have been investigated in a number of studies .
However , results of the effectiveness of studies to- date have been inconsistent .
Aim To conduct a systematic review to evaluate the effectiveness of school-based interventions design ed to reduce sedentary behaviour on objective ly measured sedentary time in children .