Department of Psychiatry and Human Behavior, Warren Alpert Medical School of Brown University, The Miriam Hospital/Weight Control and Diabetes Research Center, 196 Richmond Street, Providence, RI 02903, USA.
Obes Surg. 2012 Mar;22(3):347-52. doi: 10.1007/s11695-011-0491-1.
Objective quantification of physical activity (PA) is needed to understand PA and sedentary behaviors in bariatric surgery patients, yet it is unclear whether PA estimates produced by different monitors are comparable and can be interpreted similarly across studies.
We compared PA estimates from the Stayhealthy RT3 triaxial accelerometer (RT3) and the Sensewear Pro(2) Armband (SWA) at both the group and individual participant level. Bariatric surgery candidates were instructed to wear the RT3 and SWA during waking hours for 7 days. Participants meeting valid wear time requirements (≥4 days of ≥8 h/day) for both monitors were included in the analyses. Time spent in sedentary (<1.5 METs), light (1.5-2.9 METs), moderate-to-vigorous (MVPA; ≥3.0 METs), and total PA (TPA; ≥1.5 METs) according to each monitor was compared.
Fifty-five participants (BMI 48.4 ± 8.2 kg/m(2)) met wear time requirements. Daily time spent in sedentary (RT3 582.9 ± 94.3; SWA 602.3 ± 128.6 min), light (RT3 131.9 ± 60.0; SWA 120.6 ± 65.7 min), MVPA (RT3 25.9 ± 20.9; SWA 29.9 ± 19.5 min), and TPA (RT3 157.8 ± 74.5; SWA 150.6 ± 80.7 min) was similar between monitors (p > 0.05). While the average difference in TPA between the two monitors at the group level was 7.2 ± 64.2 min; the average difference between the two monitors for each participant was 45.6 ± 45.4 min. At the group level, the RT3 and SWA provide similar estimates of PA and sedentary behaviors; however, concordance between monitors may be compromised at the individual level.
Findings related to PA and sedentary behaviors at the group level can be interpreted similarly across studies when either monitor is used.
客观量化体力活动（PA）对于了解减重手术患者的 PA 和久坐行为是必要的，但目前尚不清楚不同监测器产生的 PA 估计值是否具有可比性，并且在研究之间是否可以进行类似的解释。
我们比较了 Stayhealthy RT3 三轴加速度计（RT3）和 Sensewear Pro（2）臂带（SWA）在组和个体参与者水平上的 PA 估计值。要求减重手术候选者在清醒时佩戴 RT3 和 SWA 7 天。符合两种监测器的有效佩戴时间要求（≥4 天，每天≥8 小时）的参与者被纳入分析。根据每个监测器比较了久坐（<1.5 METs）、轻体力活动（1.5-2.9 METs）、中高强度体力活动（MVPA；≥3.0 METs）和总体力活动（TPA；≥1.5 METs）的时间。
55 名参与者（BMI 48.4±8.2kg/m²）符合佩戴时间要求。每天的久坐时间（RT3 582.9±94.3；SWA 602.3±128.6min）、轻体力活动（RT3 131.9±60.0；SWA 120.6±65.7min）、MVPA（RT3 25.9±20.9；SWA 29.9±19.5min）和 TPA（RT3 157.8±74.5；SWA 150.6±80.7min）在两种监测器之间相似（p>0.05）。虽然两组之间 TPA 的平均差异为 7.2±64.2min，但两组之间每个参与者的平均差异为 45.6±45.4min。在组水平上，RT3 和 SWA 对 PA 和久坐行为提供了相似的估计值；然而，在个体水平上，监测器之间的一致性可能受到影响。
当使用任何一种监测器时，都可以在研究之间类似地解释组水平的 PA 和久坐行为相关发现。
