Estimating physical activity in youth using an ankle accelerometer.
Estimating physical activity in youth using an ankle accelerometer.
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DOI：
10.1080/02640414.2018.1449091
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发表时间：
2018-10
影响因子：
3.4
通讯作者：
Bassett DR Jr
中科院分区：
文献类型：
--
作者：
Crouter SE;Oody JF;Bassett DR Jr
本研究开发并验证了用于腕式ActiGraph加速度计的矢量幅度（VM）双回归模型（2RM）。为了建立模型，181名青少年（平均±SD，年龄12.0±1.5岁）完成了30分钟的仰卧休息和2-7次结构化活动。为了交叉验证，42名青年（年龄，12.6±0.8岁）完成了大约2小时的非结构化身体活动（PA）。使用ActiGraph加速度计收集PA数据（非优势踝关节），VM以计数/5-s表示。测量的能量消耗（Cosmed K4b2）被转换为青年代谢当量（METy；活动VO2除以静息VO2）。计算每个活动的变异系数（CV），以区分连续步行/跑步和间歇活动。踝关节VM久坐行为阈值≤10计数/5-s， CV≤15计数/5-s用于识别步行/跑步。在非结构化PA期间，踝关节VM2RM与测量的METy在0.42 METy范围内（P>0.05）。踝关节VM2RM在久坐、LPA、MPA和VPA测量时间的5.7 min内（P < 0.05）。与K4b2相比，踝关节VM2RM在非结构化比赛中提供了类似的估计值，并为未来的研究提供了可行的磨损位置。
This study developed and validated a vector magnitude (VM) two-regression model (2RM) for use with an ankle-worn ActiGraph accelerometer. For model development, 181 youth (mean ± SD; age, 12.0 ± 1.5 yr) completed 30 min of supine rest and 2–7 structured activities. For cross-validation, 42 youth (age, 12.6 ± 0.8 yr) completed approximately 2 hr of unstructured physical activity (PA). PA data were collected using an ActiGraph accelerometer, (non-dominant ankle) and the VM was expressed as counts/5-s. Measured energy expenditure (Cosmed K4b2) was converted to youth METs (METy; activity VO2 divided by resting VO2). A coefficient of variation (CV) was calculated for each activity to distinguish continuous walking/running from intermittent activity. The ankle VM sedentary behavior threshold was ≤10 counts/5-s, and a CV≤15 counts/5-s was used to identify walking/running. The ankle VM2RM was within 0.42 METy of measured METy during the unstructured PA (P>0.05). The ankle VM2RM was within 5.7 min of measured time spent in sedentary, LPA, MPA, and VPA (P>0.05). Compared to the K4b2, the ankle VM2RM provided similar estimates to measured values during unstructured play and provides a feasible wear location for future studies.
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影响因子：
2.4
作者：
Kim, Do Yoon;Jung, Yoo-Suk;Joo, Nam-Seok
通讯作者：
Joo, Nam-Seok
DOI：
10.1249/mss.0b013e3182447825
发表时间：
2012-06-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Crouter, Scott E.;Horton, Magdalene;Bassett, David R., Jr.
通讯作者：
Bassett, David R., Jr.
DOI：
10.1249/mss.0000000000001532
发表时间：
2018-05-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Hibbing, Paul R.;Lamunion, Samuel R.;Crouter, Scott E.
通讯作者：
Crouter, Scott E.
影响因子：
3.3
作者：
Crouter, SE;Clowers, KG;Bassett, DR
通讯作者：
Bassett, DR
影响因子：
4.1
作者：
Crouter SE;Flynn JI;Bassett DR Jr
通讯作者：
Bassett DR Jr