The Physical Activity Exchange, Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 2AT, United Kingdom.
Am J Hum Biol. 2014 Jul-Aug;26(4):446-51. doi: 10.1002/ajhb.22537. Epub 2014 Mar 6.
(1) Investigate whether clustered cardiometabolic risk score, cardiorespiratory fitness (CRF), sedentary time (ST), and body mass index Z-scores (BMI Z-scores), differed between participants that met and did not achieve ≥60 min of daily moderate to vigorous intensity physical activity (MVPA). (2) Compare clustered cardiometabolic risk score, BMI Z-score, ST, and MVPA by CRF status.
One hundred and one (n = 45 boys) 10- to 12-year-old participants took part in this cross-sectional study, conducted in Liverpool (Summer 2010) and Ulster (Spring 2011) UK. Assessments of blood markers, stature, sitting stature, body mass, waist circumference, flow mediated dilation (FMD), and resting blood pressure (BP) were completed. CRF (VO2 peak) was estimated using an individually calibrated treadmill protocol. Habitual MVPA and ST were assessed using an individually calibrated accelerometer protocol. Clustered cardiometabolic risk scores were calculated using blood markers, FMD (%), BP and anthropometric measures. Participants were classified as active (≥60 min MVPA) or inactive and as fit or unfit. Multivariate analysis of covariance (MANCOVA) was used to investigate differences in cardiometabolic risk, BMI Z-score, CRF, and ST by activity status. MANCOVA was also completed to assess differences in cardiometabolic risk, MVPA, ST, and BMI Z-score by fitness status.
Inactive children exhibited significantly higher clustered cardiometabolic risk scores and ST, and lower CRF than active children. Unfit participants exhibited significantly higher clustered cardiometabolic risk scores, BMI Z-scores and ST and lower MVPA in comparison to fit participants.
This study highlights the importance of children achieving 60 min MVPA daily and provides further evidence surrounding the importance of CRF for health.
(1) 调查在达到和未达到每天至少 60 分钟的中等到剧烈强度体力活动 (MVPA) 的参与者中，簇状心血管代谢风险评分、心肺功能 (CRF)、久坐时间 (ST) 和体质指数 Z 评分 (BMI Z 评分) 是否存在差异。(2) 根据 CRF 状态比较簇状心血管代谢风险评分、BMI Z 评分、ST 和 MVPA。
101 名 (n = 45 名男孩) 年龄在 10 至 12 岁的参与者参加了这项横断面研究，该研究在英国利物浦 (2010 年夏季) 和阿尔斯特 (2011 年春季) 进行。完成了血液标志物、身高、坐姿身高、体重、腰围、血流介导扩张 (FMD) 和静息血压 (BP) 的评估。使用个体校准的跑步机方案估计 CRF (VO2 峰值)。使用个体校准的加速度计方案评估习惯性 MVPA 和 ST。使用血液标志物、FMD(%)、BP 和人体测量指标计算簇状心血管代谢风险评分。参与者被分类为活跃 (≥60 分钟 MVPA) 或不活跃，以及健康或不健康。使用协方差分析 (MANCOVA) 来研究活动状态下心血管代谢风险、BMI Z 评分、CRF 和 ST 的差异。还完成了 MANCOVA 来评估在健康状态下心血管代谢风险、MVPA、ST 和 BMI Z 评分的差异。
不活跃的儿童表现出显著更高的簇状心血管代谢风险评分和 ST，以及更低的 CRF，而活跃的儿童。与健康的参与者相比，不健康的参与者表现出显著更高的簇状心血管代谢风险评分、BMI Z 评分和 ST，以及更低的 MVPA。
这项研究强调了儿童每天达到 60 分钟 MVPA 的重要性，并提供了更多关于 CRF 对健康重要性的证据。
