Smith, L; Aggio, D; Hamer, M; (2018) Longitudinal patterns in objective physical activity and sedentary time in a multi-ethnic sample of children from the UK. Pediatric Obesity , 13 (2) pp. 120-126. 10.1111/ijpo.12222.

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Abstract

BACKGROUND: Children of South Asian decent born in the UK display lower levels of physical activity than British Caucasians although no longitudinal data are available. OBJECTIVES: We aimed to investigate change in activity levels over 1 year in a diverse ethnic sample of children residing in London, UK. METHODS: Children were categorized into ethnic groups (Caucasian/mixed, Black, South Asian). At baseline and 1-year follow-up, children’s objective physical activity was monitored (Actigraph accelerometer) for at least 1 day. Mixed models were employed to investigate differences in change in activity levels between ethnic groups. RESULTS: A total of 281 children were included in the analyses. South Asians had a significantly greater increase in time spent sedentary at follow‐up than those of a Caucasian/mixed ethnicity (B [ratio sedentary/wear time] = 0.024; 95% confidence interval 0.003, 0.046). South Asian children recorded lower moderate to vigorous physical activity at baseline (B = −6.5, 95% confidence interval, −11.1, −1.9 min d−1, p = 0.006) although levels remained relatively stable over follow‐up and changes did not differ across ethnic group. CONCLUSIONS: In a diverse ethnic sample of children from inner city London, those of a South Asian ethnicity exhibited a significantly greater increase in sedentary time over a period of 12 months in comparison with Caucasian/mixed and Black children

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