Centre for Diet and Activity Research (CEDAR), MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Cambridge, UK.
University of East Anglia Faculty of Medicine and Health Sciences, Norwich, UK.
BMJ Open. 2019 May 27;9(5):e027627. doi: 10.1136/bmjopen-2018-027627.
To investigate if daily vigorous physical activity (VPA), adjusted for minutes of moderate physical activity (MPA) performed, differs by socioeconomic position or ethnicity in a large sample of UK children with objectively measured physical activity.
Nationally representative prospective cohort study.
UK children born between 2000 and 2002.
5172 children aged 7-8 with valid accelerometer data for ≥10 hour on ≥3 days, including 1 weekend day.
Time spent in VPA (>3841 counts per min).
Maternal education, annual household Organisation for Economic Co-Operation and Development equivalised income, ethnicity.
Multivariable linear regression models fitted to explore differences in average daily minutes of VPA (adjusted for MPA, mean accelerometer wear time, season of measurement, age and sex), revealed significantly higher amounts of VPA accumulated as a child's socioeconomic position increased (highest vs lowest level of maternal education: β: 2.96, p: 0.00; annual household equivalised income: β: 0.58, p: 0.00, per £10 000 annual increase). Additionally, children from certain minority ethnicities (Bangladeshi and Pakistani: β: -3.34, p: 0.00; other ethnic groups: β:-2.27, p: 0.02) accrued less daily VPA compared with their white British counterparts.
The socioeconomic and ethnic patterning of vigorous activity observed in this study mirrors parallel inequalities in rates of childhood obesity. Given the stronger association of VPA with adiposity than of MPA, intensity specific differences may be contributing to widening inequalities in obesity. Accordingly, these findings suggest that the current global focus on overall moderate-to-vigorous intensity activity may mask important behavioural inequalities.
在一项具有大量客观身体活动测量数据的英国儿童样本中，研究在调整中等强度身体活动（MPA）时间的情况下，日常剧烈身体活动（VPA）是否因社会经济地位或种族而有所不同。
具有全国代表性的前瞻性队列研究。
2000 年至 2002 年期间在英国出生的儿童。
5172 名 7-8 岁儿童，在至少 3 天内每天至少佩戴加速计 10 小时，包括 1 个周末。
VPA 时间（每分钟>3841 计数）。
母亲的教育程度、家庭的经合组织年度等效收入、种族。
多元线性回归模型拟合结果显示，随着儿童社会经济地位的提高，VPA 的平均日积累量差异显著（调整 MPA、平均加速计佩戴时间、测量季节、年龄和性别）（母亲教育程度最高与最低水平相比：β：2.96，p：0.00；家庭年收入经合组织等效值：β：0.58，p：0.00，每年增加£10000）。此外，某些少数族裔儿童（孟加拉国和巴基斯坦裔：β：-3.34，p：0.00；其他族裔群体：β：-2.27，p：0.02）的日常 VPA 积累量明显少于其英国白人同龄人。
本研究观察到剧烈活动的社会经济和种族模式与儿童肥胖率的平行不平等现象相吻合。鉴于 VPA 与肥胖的关联强于 MPA，强度特异性差异可能导致肥胖不平等现象加剧。因此，这些发现表明，目前全球对中等至剧烈强度活动的总体关注可能掩盖了重要的行为不平等现象。
