反力支具能在腕关节伸展运动中减少普通伸肌腱负荷吗？一项体内研究

IF 2.4 3区医学 Q3 BIOPHYSICS

Journal of biomechanics Pub Date : 2025-08-16 DOI:10.1016/j.jbiomech.2025.112909

Nico Magni , Richard Ellis , Leanne Bisset , Alberto Gonzalez-Vazquez , Antoine Nordez , Peter McNair

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引用次数: 0

摘要

本研究通过超声测量横波速度（SWV）来评估反力支具对肘关节总伸肌起点（CEO）肌腱的生物力学影响。假设反力支撑可以减少SWV，这是肌腱刚度的替代测量，同时手腕和手指伸肌在不同程度的最大自愿收缩（MVC）下收缩。在本横断面研究中，19名健康受试者（年龄±SD: 30±9）被纳入研究。在前臂施加0或80 mmHg压力的反力支具。在四种不同的腕伸肌MVC水平下测量SWV: 0%、20%、30%和40%。反力支撑对CEO肌腱静止SWV （V-statistic = 86, p = 0.74）、20% （V-statistic = 105, p = 0.71）、30% （V-statistic = 87, p = 0.77）、40% （V-statistic = 94, p = 0.98）的MVC无显著影响。重复测量的Friedman检验显示，SWV随着手腕伸展MVC水平的增加而增加（x2 = 7.9, p = 0.048）。总之，在休息状态下或腕伸肌收缩时，反力支具对肘关节的CEO似乎没有生物力学影响。CEO的SWV是肌腱刚度的代表，随着MVC水平的增加而增加。

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Does a counterforce brace reduce common extensor tendon loading during a wrist extension task? An in vivo study

This study assessed the biomechanical effect of a counterforce brace on the common extensor origin (CEO) tendon at the elbow via the measurement of shear wave velocity (SWV) using ultrasound. The counterforce brace was hypothesised to reduce SWV, which is a proxy measure of tendon stiffness, whilst the wrist and finger extensors were contracting at different levels of maximum voluntary contraction (MVC). In this cross-sectional study, nineteen healthy participants (age±SD: 30±9) were included in the study. The counterforce brace was applied with either 0 or 80 mmHg pressure to the forearm. The SWV was measured under four different wrist extensors MVC levels: 0%, 20%, 30%, and 40%. The counterforce brace had no significant effect on CEO tendon SWV at rest (V-statistic = 86, p = 0.74), 20% (V-statistic = 105, p = 0.71), 30% (V-statistic = 87, p = 0.77), or 40% (V-statistic = 94, p = 0.98) of MVC. The Friedman test for repeated measures showed an increase in SWV with greater levels of wrist extension MVC (x² = 7.9, p = 0.048). In conclusion, the counterforce brace does not appear to have a biomechanical effect on the CEO of the elbow during resting conditions or whilst the wrist extensors are contracting. The SWV of the CEO, a proxy for tendon stiffness, increases with greater levels of MVC.

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来源期刊

Journal of biomechanics 生物-工程：生物医学

CiteScore

5.10

自引率

4.20%

发文量

345

审稿时长

1 months

期刊介绍： The Journal of Biomechanics publishes reports of original and substantial findings using the principles of mechanics to explore biological problems. Analytical, as well as experimental papers may be submitted, and the journal accepts original articles, surveys and perspective articles (usually by Editorial invitation only), book reviews and letters to the Editor. The criteria for acceptance of manuscripts include excellence, novelty, significance, clarity, conciseness and interest to the readership. Papers published in the journal may cover a wide range of topics in biomechanics, including, but not limited to: -Fundamental Topics - Biomechanics of the musculoskeletal, cardiovascular, and respiratory systems, mechanics of hard and soft tissues, biofluid mechanics, mechanics of prostheses and implant-tissue interfaces, mechanics of cells. -Cardiovascular and Respiratory Biomechanics - Mechanics of blood-flow, air-flow, mechanics of the soft tissues, flow-tissue or flow-prosthesis interactions. -Cell Biomechanics - Biomechanic analyses of cells, membranes and sub-cellular structures; the relationship of the mechanical environment to cell and tissue response. -Dental Biomechanics - Design and analysis of dental tissues and prostheses, mechanics of chewing. -Functional Tissue Engineering - The role of biomechanical factors in engineered tissue replacements and regenerative medicine. -Injury Biomechanics - Mechanics of impact and trauma, dynamics of man-machine interaction. -Molecular Biomechanics - Mechanical analyses of biomolecules. -Orthopedic Biomechanics - Mechanics of fracture and fracture fixation, mechanics of implants and implant fixation, mechanics of bones and joints, wear of natural and artificial joints. -Rehabilitation Biomechanics - Analyses of gait, mechanics of prosthetics and orthotics. -Sports Biomechanics - Mechanical analyses of sports performance.