McCrorie, PRW, Duncan, E, Granat, MH and Stansfield, BW 2012, 'The prevalence of upright non-stepping time in comparison to stepping time in 11–13 year old school children across seasons' , Physiological Measurement, 33 (11) , pp. 1901-1912.
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Evidence suggests that behaviours such as standing are beneﬁcial for our health. Unfortunately, little is known of the prevalence of this state, its importance in relation to time spent stepping or variation across seasons. The aim of this study was to quantify, in young adolescents, the prevalence and seasonal changes in time spent upright and not stepping (UNSttime) as well as time spent upright and stepping (USttime), and their contribution to overall upright time (Utime). Thirtythree adolescents (12.2 ± 0.3 y) wore theactivPAL activity monitor during four school days on two occasions: November/December (winter) and May/June (summer). UNSttime contributed 60% of daily Utime at winter (Mean=196 min) and 53% at summer (Mean = 171 min); a signiﬁcant seasonal effect, p < 0.001. USttimewas signiﬁcantly greater in summer compared to winter (153 min versus 131 min, p<0.001). The effects in UNSttime could be explained through signiﬁcant seasonal differences during the school hours (09:00–16:00), whereas the effects in USttime could be explained through signiﬁcant seasonal differences in the evening period (16:00–22:00). Adolescents spent a greater amount of time upright and not stepping than they did stepping, in both winter and summer. The observed seasonal effects for both UNSttime and USttime provide important information for behaviour change intervention programs.
|Schools:||Schools > School of Health Sciences > Centre for Health Sciences Research|
|Journal or Publication Title:||Physiological Measurement|
|Depositing User:||S Rafiq|
|Date Deposited:||12 Sep 2014 15:06|
|Last Modified:||12 Sep 2014 15:06|
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