三轴加速度计佩戴身体不同位置不同运动条件下能量消耗的变异性  

Tri-axial accelerometer placed at different locations of the body to assess the variation of energy expenditure under different exercise conditions

作　　者：解浩东 尚尧 欧阳一毅 罗炯[1,4] Xie Haodong;Shang Yao;Ouyang Yiyi;Luo Jiong(Research Centre For Exercise Detoxification,College of Physical Education,Southwest University,Chongqing 400715,China;Department of Physical Education,Xi’an Jiaotong University,Xi’an 710049,Shaanxi Province,China;College of Physical Education,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;State Key Laboratory of Physical Fitness Evaluation and Sports Function Monitoring,College of Physical Education,Southwest University,Chongqing 400715,China)

机构地区：[1]西南大学体育学院运动戒毒研究中心,重庆市400715 [2]西安交通大学体育中心,陕西省西安市710049 [3]重庆邮电大学体育学院,重庆市400065 [4]西南大学国家体育总局体质评价与运动机能监控重点实验室,重庆市400715

出　　处：《中国组织工程研究》2023年第23期3707-3713,共7页Chinese Journal of Tissue Engineering Research

基　　金：教育部人文社会科学研究项目(20YJA890018),项目负责人:罗炯;中央高校基本科研业务费专项资金(SWU1709433),项目负责人:解浩东。

摘　　要：背景:三轴加速计是评估身体活动量常用的客观测量工具之一,佩戴位置是影响其效度的关键因素,探讨佩戴位置对于身体活动量评估的影响,对实践应用具有重要意义。目的:探讨三轴加速度计Acti Graph wGT3X-BT佩戴于身体不同位置(手腕、腰、大腿、踝)且在不同运动条件下(4,6,8 km/h)测得能量消耗的变异性,从而为正确配戴及科学使用wGT3X提供实践及理论参考。方法:15名健康男性大学生,年龄(24.8±1.7)岁,身高(174.1±4.8)cm,体质量(69.5±8.6)kg,体脂率(18.1±5.8)%,自愿参与此项试验。受试者同时佩戴三轴加速度计wGT3X(手腕、腰、大腿、踝)及METALYZER-Ⅱ肺功仪面罩,在运动跑台上完成不同运动强度的走(4 km/h正常走、6km/h快速走)、跑(8km/h中速跑)运动,以获取加速度计数、预估能耗、实测运动能耗等相关参数,利用SPSS19.0版本分析软件对获取的相关数据进行统计分析。结果与结论:(1)同一佩戴位置的加速度计在3种运动强度下所测得预估能耗及加速度计数均存在显著差异。当速度为4 km/h时,手腕、腰部三轴加速度计略微低估运动能耗,6 km/h和8 km/h时,手腕处加速度计出现较为明显的低估现象,腰部加速计出现略微高估的现象;而大腿处加速度计仅在4 km/h出现较小误差,随后便出现明显高估的趋势;踝关节位置加速度计在3种运动强度均明显高估运动能耗,所测得能耗及加速度计数最高。(2)同一运动水平下,仅腰部加速度计预估能耗与实测运动能耗达显著相关(中高度相关),为4个佩戴位置中最高,且Y轴(矢状轴)、Z轴(垂直轴)及综合向量与实测运动能耗之相关性均大于X轴(冠状轴),相关性从大至小依次为综合向量>Z轴>Y轴>X轴;同时腰部加速度计对于实测运动能耗的解释能力最高,且相对稳定,平均误差最小。(3)结论:wGT3X三轴加速度计预估能耗的准确性受佩戴位置及运动强度的影响,误差水平�BACKGROUND:The tri-axial accelerometer is one of the most commonly used objective measurement tools for assessing physical activity volume,and its placing location is a key factor affecting its validity.Therefore,it is important to explore the impact of placing location on physical activity volume assessment for practical application.OBJECTIVE:To investigate the variation of energy expenditure measured by tri-axial accelerometer ActiGraph wGT3X-BT in different positions of the body(wrist,waist,thigh,and ankle)and under different exe rcise conditions(4,6,8 km/h),thereby providing practical and theoretical reference for proper wearing and scientific use of wGT3X.METHODS:Fifteen healthy male college students[age(24.8±1.7)years old,height(174.1±4.8)cm,body mass(69.5±8.6)kg,body fat percentage(18.1±5.8)%]volunteered to participate in the study.During the experiment,the subjects wore tri-axial accele rometers wGT3X(wrist,waist,thigh,and squat)and METALYZER-II lung function mask at the same time,and completed different exercise intensity on the sports treadmill(4 km/h normal walk,6 km/h fast walk,8 km/h medium speed running),to obtain acceleration count,estimated energy expenditure,and measured sports energy expenditure.The data were statistically analyzed using SPSS 19.0 version analysis software.RESULTS AND CONCLUSION:There was a significant difference in the estimated energy expenditure and the acceleration count measured by the accelerometer in the same placing position under three exercise intensities.When the running speed was 4 km/h,the tri-axial accele rometer at the wrist and waist slightly underestimated the energy expenditure of the exercise.At the speed of 6 and 8 km/h,the accelerometer at the wrist obviously underestimated the energy expenditure,while the accele rometer at the lumbar slightly overestimated the energy expenditure.The accelerometer at the thigh only showed a small error at 4 km/h,and then there was a marked overestimation trend.The accelerometer at the ankle joint dramatically overestimat

关 键 词：三轴加速度计 佩戴位置 wGT3X 身体活动量 跑台 

分 类 号：R459.9[医药卫生—治疗学]