University of Coimbra, Coimbra, Portugal.
J Sports Sci. 2011 Nov;29(14):1503-14. doi: 10.1080/02640414.2011.593185. Epub 2011 Oct 11.
The agreement between self-reported and objective estimates of activity energy expenditure was evaluated in adolescents by age, sex, and weight status. Altogether, 403 participants (217 females, 186 males) aged 13-16 years completed a 3-day physical activity diary and wore a GT1M accelerometer on the same days. Partial correlations (controlling for body mass) were used to determine associations between estimated activity energy expenditure (kcal · min(-1)) from the diary and accelerometry. Differences in the magnitude of the correlations were examined using Fisher's r to z transformations. Bland-Altman procedures were used to determine concordance between the self-reported and objective estimates. Partial correlations between assessments of activity energy expenditure (kcal · min(-1)) did not differ significantly by age (13-14 years: r = 0.41; 15-16 years: r = 0.42) or weight status (normal weight: r = 0.42; overweight: r = 0.39). The magnitude of the association was significantly affected by sex (Δr = 0.11; P < 0.05). The agreement was significantly higher in males than in females. The relationship between activity energy expenditure assessed by the objective method and the 3-day diary was moderate (controlling for weight, correlations ranged between 0.33 and 0.44). However, the 3-day diary revealed less agreement in specific group analyses; it markedly underestimated activity energy expenditure in overweight/obese and older adolescents. The assessment of activity energy expenditure is complex and may require a combination of methods.
本研究旨在通过年龄、性别和体重状况来评估青少年自我报告活动能量消耗与客观估计值之间的一致性。共有 403 名 13-16 岁的参与者(女性 217 名,男性 186 名)完成了 3 天的体力活动日记,并在相同的日子里佩戴了 GT1M 加速度计。使用偏相关(控制体重)来确定日记和加速度计估计的活动能量消耗(千卡·分钟(-1))之间的关联。使用 Fisher 的 r 到 z 变换来检查相关性大小的差异。Bland-Altman 程序用于确定自我报告和客观估计之间的一致性。活动能量消耗(千卡·分钟(-1))评估之间的偏相关在年龄(13-14 岁:r = 0.41;15-16 岁:r = 0.42)或体重状况(正常体重:r = 0.42;超重:r = 0.39)方面没有显著差异。关联的大小受性别显著影响(Δr = 0.11;P < 0.05)。男性的一致性明显高于女性。客观方法评估的活动能量消耗与 3 天日记之间的关系为中度(控制体重,相关性在 0.33 到 0.44 之间)。然而,在特定的组分析中,3 天日记的一致性明显较低;它明显低估了超重/肥胖和年龄较大的青少年的活动能量消耗。活动能量消耗的评估很复杂,可能需要多种方法的结合。