MRC Epidemiology Unit, Institute of Metabolic Science, Addenbrooke’s Hospital, Box 285, Hills Road, Cambridge CB2 0QQ, UK.
Br J Nutr. 2011 Jan;105(2):316-21. doi: 10.1017/S0007114510003272.
Studies show an inverse relationship between breakfast frequency and weight gain. This may reflect poor eating habits generally and associated low physical activity (PA) or direct impacts of breakfast on mechanisms leading to lethargy and reduced PA. The relationship between breakfast frequency and PA is inconclusive. We aimed to determine whether breakfast frequency is associated with PA levels in British adolescents independent of body composition and socio-economic status (SES). Habitual breakfast frequency (self-report questionnaire) was assessed in 877 adolescents (43% male, age 14·5 (SD 0·5) years old). PA was measured over 5 d (accelerometry, average counts/ min; cpm). Associations between daily PA and breakfast frequency were assessed using linear regression adjusted for body fat percentage and SES. Effect modification by sex and associations with PA during the morning (06.00-12.00 hours) were explored. For boys, there were no significant associations between breakfast frequency and PA. For girls, less frequent breakfast consumption was significantly associated with lower PA (cpm) during the morning (occasional v. frequent b - 6·1 (95% CI - 11·1, -1·1), P = 0·017) when adjusted for body fat percentage and SES. There were no associations between PA and breakfast consumption over the whole day; however, for girls, less frequent breakfast consumption may be associated with lower PA levels during the morning, suggesting that breakfast consumption should perhaps be taken into consideration when aiming to promote PA in adolescent girls.
研究表明，早餐频率与体重增加呈负相关。这可能反映了总体不良的饮食习惯以及与之相关的低体力活动（PA），或者早餐对导致嗜睡和减少 PA 的机制的直接影响。早餐频率与 PA 之间的关系尚无定论。我们旨在确定在不考虑身体成分和社会经济地位（SES）的情况下，英国青少年的早餐频率与 PA 水平之间是否存在关联。通过自我报告问卷评估了 877 名青少年（43%为男性，年龄 14.5（SD 0.5）岁）的习惯性早餐频率。通过加速度计测量了 5 天的 PA（平均每分钟计数；cpm）。使用线性回归调整体脂肪百分比和 SES，评估了每日 PA 与早餐频率之间的关联。探讨了性别和与上午（06.00-12.00 小时）PA 的关联的效应修饰。对于男孩，早餐频率与 PA 之间没有显著关联。对于女孩，与频繁早餐相比，偶尔吃早餐与上午的 PA（cpm）较低显著相关（偶尔 v. 频繁 b - 6.1（95%CI-11.1，-1.1），P = 0.017），当调整体脂肪百分比和 SES 时。全天 PA 与早餐消耗之间没有关联；然而，对于女孩，偶尔吃早餐可能与上午的 PA 水平较低有关，这表明在旨在促进青少年女孩 PA 时，早餐消耗应该被考虑。
