Jakicic John M, King Wendy C, Gibbs Bethany Barone, Rogers Renee J, Rickman Amy D, Davis Kelliann K, Wahed Abdus, Belle Steven H
Dept of Health and Physical Activity, Physical Activity and Weight Management Research Center, University of Pittsburgh, PA.
J Phys Act Health. 2015 Oct;12(10):1394-400. doi: 10.1123/jpah.2014-0277. Epub 2015 Jan 19.
To compare moderate-to-vigorous intensity physical activity (MVPA) assessed via questionnaires to an objective measure of MVPA in overweight or obese young adults.
MVPA was assessed in 448 [median BMI = 31.2 (Interquartile Range: 28.5-34.3) kg/m2] young adults [median age: 30.9 (Interquartile Range: 27.8-33.7) years]. Measures included the SenseWear Armband (MVPAOBJ), the Paffenbarger Questionnaire (MVPAPAFF), and the Global Physical Activity Questionnaire (GPAQ). The GPAQ was used to compute total MVPA (MVPAGPAQ-TOTAL) and MVPA from transportation and recreation (MVPAGPAQ-REC).
The association between MVPAOBJ and MVPAPAFF was rs = 0.40 (P < .0001). Associations between MVPAOBJ and MVPAGPAQ-TOTAL and MVPAGPAQ-REC were rs = 0.19 and rs = 0.32, respectively (P < .0001). MVPAGPAQ-TOTAL was significantly greater than MVPAOBJ (P < .0001). Median differences in MET-min/week between MVPAOBJ and MVPAPAFF or MVPAGPAQ-REC were not significantly different from zero. There was proportional bias between each self-reported measure of MVPA and MVPAOBJ. There were significant associations between all measures of MVPA and fitness. MVPAOBJ was significantly associated with BMI and percent body fat.
Objective and self-reported measures of MVPA are weakly to moderately correlated, with substantial differences between measures. MVPAOBJ provided predictive validity with fitness, BMI, and percent body fat. Thus, an objective measure of MVPA may be preferred to self-report in young adults.
比较通过问卷评估的超重或肥胖青年成年人的中等到剧烈强度身体活动（MVPA）与MVPA的客观测量结果。
对448名[中位体重指数=31.2（四分位间距：28.5 - 34.3）kg/m²]青年成年人[中位年龄：30.9（四分位间距：27.8 - 33.7）岁]进行MVPA评估。测量方法包括SenseWear臂带（MVPAOBJ）、帕芬巴格问卷（MVPAPAFF）和全球身体活动问卷（GPAQ）。GPAQ用于计算总MVPA（MVPAGPAQ - TOTAL）以及交通和娱乐方面的MVPA（MVPAGPAQ - REC）。
MVPAOBJ与MVPAPAFF之间的关联为rs = 0.40（P <.0001）。MVPAOBJ与MVPAGPAQ - TOTAL和MVPAGPAQ - REC之间的关联分别为rs = 0.19和rs = 0.32（P <.0001）。MVPAGPAQ - TOTAL显著大于MVPAOBJ（P <.0001）。MVPAOBJ与MVPAPAFF或MVPAGPAQ - REC之间每周代谢当量 - 分钟的中位差异与零无显著差异。每种自我报告的MVPA测量方法与MVPAOBJ之间存在比例偏差。所有MVPA测量方法与体能之间均存在显著关联。MVPAOBJ与体重指数和体脂百分比显著相关。
MVPA的客观测量与自我报告测量之间呈弱到中度相关，各测量方法之间存在实质性差异。MVPAOBJ在体能、体重指数和体脂百分比方面具有预测效度。因此，在青年成年人中，MVPA的客观测量可能比自我报告更可取。
