Tomaz S A, Lambert E V, Karpul D, Kolbe-Alexander T L
a Department of Human Biology, Faculty of Health Sciences , MRC/UCT Research Unit for Exercise Science and Sports Medicine, University of Cape Town , Cape Town , South Africa.
b Centre for Research on Exercise, Physical Activity and Health, School of Human Movement Studies , University of Queensland , Brisbane , QLD , Australia.
Eur J Sport Sci. 2016;16(1):149-57. doi: 10.1080/17461391.2014.987323. Epub 2014 Dec 24.
The aim of this research study was to determine whether the level of agreement between self-reported and objective measures of physical activity (PA) is influenced by cardiovascular fitness. Participants (n = 113) completed the Global Physical Activity Questionnaire (GPAQ), a health risk assessment and a sub-maximal 12-minute step test. Age-predicted VO2max was used to classify participants as lower fit and higher fit (HF). ActiGraph (GT3X) accelerometers were worn for 7 consecutive days. Matthews cut points were used to calculate minutes of moderate and vigorous PA (MVPA) per week. Bland-Altman plots were used to measure limits of agreement between GPAQ and ActiGraph MVPA. The participants' mean age was 37.9 ± 12.7 years and more than 60% were categorised as HF (n = 71). Moderate PA was over-reported in 39% of all participants. Most of the over-reporters for moderate PA were in the HF group (64.1%). Vigorous PA was over-reported by 72.6% of all participants. The discrepancy between self-reported and objective measures of vigorous PA increased with increasing self-reported time spent in vigorous PA. Fitter individuals appear to over-report PA more than lesser fit participants, suggesting that fitness could influence the level of agreement between self-reported and objective measures of PA.
本研究的目的是确定身体活动（PA）的自我报告与客观测量之间的一致性水平是否受心血管健康状况的影响。参与者（n = 113）完成了全球身体活动问卷（GPAQ）、健康风险评估以及一项12分钟的亚极量台阶测试。使用年龄预测的最大摄氧量（VO2max）将参与者分为低健康水平组和高健康水平组（HF）。连续7天佩戴ActiGraph（GT3X）加速度计。采用马修斯切点来计算每周中等强度和剧烈身体活动（MVPA）的分钟数。使用布兰德-奥特曼图来测量GPAQ和ActiGraph MVPA之间的一致性界限。参与者的平均年龄为37.9 ± 12.7岁，超过60%被归类为HF组（n = 71）。39%的参与者中等强度PA报告过量。中等强度PA报告过量的参与者大多在HF组（64.1%）。72.6%的参与者剧烈PA报告过量。剧烈PA的自我报告与客观测量之间的差异随着自我报告的剧烈PA时间增加而增大。健康状况较好的个体似乎比健康状况较差的参与者更多地过度报告PA，这表明健康状况可能会影响PA自我报告与客观测量之间的一致性水平。
