中国组织工程研究

中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (16): 4115-4124.doi: 10.12307/2026.747

• 组织构建与生物力学 tissue construction and biomechanics • 上一篇    下一篇

工作姿势和负荷组合对上肢疲劳交互影响效应的幅频联合分析

薛恩凯，徐红旗   

  1. 东北师范大学运动能力测评与提升研究中心，吉林省长春市  130024

  • 收稿日期:2025-08-09 接受日期:2025-09-09 出版日期:2026-06-08 发布日期:2025-11-27
  • 通讯作者: 徐红旗，博士，博士生导师，教授，东北师范大学运动能力测评与提升研究中心，吉林省长春市 130024
  • 作者简介:薛恩凯，男，2004年生，天津市人，本科在读，主要从事人因工效学与运动生物力学方面的研究。
  • 基金资助:
    国家市场监管重点实验室(人因与工效学)开放基金(2023SYSKF02002)，项目负责人：徐红旗；国家重点研发计划(2023YFF0615902)，项目参与人：徐红旗；国家市场监管总局科技计划项目(2023MK192)，项目参与人：徐红旗；中央基本科研业务费项目(522023Y-10381)，项目参与人：徐红旗

Joint analysis of electromyography spectrum and amplitude of the interactive effects of work posture and load combinations on upper limb fatigue

Xue Enkai, Xu Hongqi   

  1. Research Center for Sports Performance Assessment and Enhancement, Northeast Normal University, Changchun 130024, Jilin Province, China
  • Received:2025-08-09 Accepted:2025-09-09 Online:2026-06-08 Published:2025-11-27
  • Contact: Xu Hongqi, PhD, Doctoral supervisor, Professor, Research Center for Sports Performance Assessment and Enhancement, Northeast Normal University, Changchun 130024, Jilin Province, China
  • About author:Xue Enkai, Research Center for Sports Performance Assessment and Enhancement, Northeast Normal University, Changchun 130024, Jilin Province, China
  • Supported by:
    Open Fund of the Key Laboratory of Human Factors and Ergonomics for State Market Regulation, No. 2023SYSKF02002 (to XHQ); National Key R&D Program, No. 2023YFF0615902 (to XHQ [project participant]); Science and Technology Plan Project of the State Administration for Market Regulation, No. 2023MK192 (to XHQ [project participant]); Fundamental Research Funds for the Central Universities, No. 522023Y-10381 (to XHQ [project participant]).

PDF

23

摘要：




文题释义：
工作姿势：在此次研究中是特指静态上肢作业中肩关节前屈的角度。研究设置了20°，40°和60°3种前屈角度，模拟了实际工作中常见的上肢活动范围，例如举起重物、操作工具或进行某些手工操作时，肩关节可能会处于不同的前屈角度。
幅频联合分析：是一种用于评估肌肉疲劳的方法，同时分析肌电信号的振幅和频谱的变化。使用均方根和中位频率2个指标来量化肌电信号的振幅和频谱特征，并计算了均方根斜率和中位频率斜率来反映肌肉疲劳的发展趋势。

背景：上肢工作相关肌肉骨骼疾患因对个人健康和社会经济的危害而备受关注，而肌肉疲劳是主要诱因。
目的：通过幅频联合分析法探讨姿势和负荷交互效应对静态上肢作业中肌肉疲劳特征的影响，为上肢工作相关肌肉骨骼疾患的预防提供多维度生物力学依据。
方法：14名健康受试者执行肩关节前屈20°，40°，60°的静态任务，任务负荷设置为其最大重复次数(1RM)的10%，30%和50%。同步采集表面肌电信号及Borg主观疲劳感知评估量表数据。采用幅频联合分析计算均方根斜率和中位频率斜率量化肌肉疲劳程度；应用配对样本t检验分析疲劳前后的疲劳状态占比；采用方差分析评估姿势、负荷及其交互效应对疲劳状态占比的影响。
结果与结论：①姿势-负荷组合会显著影响作业耐受性(P < 0.05)，60°50%最大重复次数组合最大保持时间最短(P < 0.001)；②特定组合下疲劳前后肌肉疲劳状态改变：20°10%最大重复次数组合下，冈上肌和斜方肌上部疲劳状态占比显著下降(P < 0.05)；40°10%最大重复次数组合下，斜方肌上部疲劳状态占比差异极显著(P < 0.01)；③姿势与负荷对肌肉疲劳的影响相互独立，在20°姿势下，三角肌前束的疲劳占比在10%最大重复次数与30%最大重复次数、10%最大重复次数与50%最大重复次数的负荷对比中有显著性差异(P < 0.05)；而在10%最大重复次数负荷条件下，三角肌前束及中束的疲劳占比仅在20°与60°角度间、在疲劳前与全程阶段表现出显著性差异(P < 0.05)；④姿势与负荷无显著交互效应(P > 0.05)；⑤提示高负荷与高角度显著加速肌肉疲劳；姿势与负荷独立影响疲劳进程，二者交互效应不显著；幅频联合分析对于姿势与负荷影响下的肌肉疲劳特征敏感性有限。
https://orcid.org/0009-0000-0773-6748(薛恩凯)


中国组织工程研究杂志出版内容重点：干细胞；骨髓干细胞；造血干细胞；脂肪干细胞；肿瘤干细胞；胚胎干细胞；脐带脐血干细胞；干细胞诱导；干细胞分化；组织工程

关键词: ">肌肉骨骼疾患"> , 上肢疲劳"> , 工作姿势"> , 外部负荷"> , 交互影响"> , 最大保持时间"> , 幅频联合分析

Abstract: BACKGROUND: Upper limb work-related musculoskeletal disorders warrant attention due to their adverse impacts on an individual’s health and socioeconomic well-being, with muscle fatigue being a primary contributing factor.
Objective: To investigate the interaction effects of work posture and load combinations on muscle fatigue characteristics during static upper limb tasks using joint analysis of electromyography  spectrum and amplitude, aiming to provide multidimensional biomechanical evidence for preventing upper limb work-related musculoskeletal disorders.
Methods: Fourteen healthy subjects performed static tasks of shoulder flexion and abduction at 20°, 40°, and 60° angles with loads set at 10%, 30%, and 50% of their one-repetition maximum. Surface electromyography signals and Borg CR-10 scale data were simultaneously recorded. Muscle fatigue was quantified using joint analysis of electromyography spectrum and amplitude-derived metrics, including root mean square slope and median frequency slope. Paired samples t-tests were used to analyze the proportion of fatigue states before and after fatigue. Analysis of variance was used to assess the effects of postures, loads, and their interaction on fatigue state proportions.
Results and Conclusion: (1) The posture-load combination significantly influenced task tolerance (P < 0.05), with the 60°-50% one-repetition maximum combination yielding the shortest maximum endurance time (P < 0.001). (2) Changes in muscle fatigue states before and after fatigue under specific combinations: fatigue state proportions in the supraspinatus and upper trapezius significantly decreased under the 20° 10% one-repetition maximum combination (P < 0.05). Fatigue state proportions in the upper trapezius showed an extremely significant difference under the 40° 10% one-repetition maximum combination (P < 0.01). (3) The effects of postures and loads on muscle fatigue were independent of each other. At 20°flexion, the proportion of fatigue in the anterior deltoid muscle showed significant differences (P < 0.05) when comparing loads of 10% one-repetition maximum versus 30% one-repetition maximum, and 10% one-repetition maximum versus 50% one-repetition maximum (P < 0.05); however, under the load condition of 10% one-repetition maximum, the fatigue proportions between the anterior and the anterior and middle deltoids showed significant differences (P < 0.05) only between the 20° and 60° angles, specifically during the pre-fatigue and full-range phases (P < 0.05).(4) No significant interaction effects between postures and loads were detected (P > 0.05). These finding indicate that high-load and high-angle tasks markedly accelerate muscle fatigue; postures and loads independently influence fatigue progression without observable synergistic effects. Joint analysis of electromyography spectrum and amplitude shows limited sensitivity to muscle fatigue characteristics in capturing posture-load interactions.


Key words: musculoskeletal disorders, upper limb fatigue, work posture, external load, interactive effects, maximum endurance time, joint analysis of electromyography spectrum and amplitude

中图分类号: