双边强度不对称在膝盖延伸:可靠性和一致性分析的科学和实际应用
Manfred Zöger1,2,3, Alfred Nimmerichter1,2,3, Arnold Baca2,3
1Training and Sports Sciences, University of Applied Sciences Wiener Neustadt, Wiener Neustadt, Austria.
Frontiers in sports and active living
|October 2, 2025
概括
双边力量不对称 (BSA) 在四头肌肌肉的测量显示可靠性差和不一致. 这种变化引发了人们对在伤害风险评估中使用BSA的担忧,这表明对结果的解释要谨慎.
科学领域:
- 生物力学 生物力学
- 运动医学 运动医学
- 肌肉骨健康 肌肉骨健康
背景情况:
- 肌肉力量失衡与肌肉骨损伤和体育表现下降有关.
- 评估双边力量不对称 (BSA) 对于理解这些赤字至关重要.
研究的目的:
- 通过动力测量来评估四头骨双侧强度不对称 (BSA) 测量的可靠性和一致性.
- 为了确定在重复测试会话中BSA和四肢主导的变异性.
主要方法:
- 29名身体活跃的个体在两次会议中进行了同度和同动力膝盖延伸测试.
- 双边强度不对称 (BSA) 由峰值扭矩计算,可靠性通过ICC,SEM,MDC和Kappa系数进行评估.
- 使用卡帕统计数据和布兰德-阿尔特曼图表分析了肢体主导一致性和会议间协议.
主要成果:
- 会议之间没有发现平均峰值扭矩或BSA的显著差异,但注意到了相当大的个体变化.
- 21%-38%的参与者在会话之间表现出肢体主导反转.
- 类内相关系数 (ICC) 表示可靠性差到中等 (0.33-0.70),卡帕系数显示不一致的肢体主导协议.
结论:
- 四肢双侧强度不对称 (BSA) 测量显示出低可靠性和不一致性,具有显著的个体变异性和频繁的四肢主导反转.
- 这些发现质疑受伤风险评估的固定BSA值的直接临床应用.
- 任务的特异性和个体的运动控制变化可能解释不一致性,需要谨慎地解释BSA数据.
相关概念视频
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
Bending of Members Made of Several Materials
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
General Case of Eccentric Axial Loading
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical bending,...
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical bending,...
Beams with Unsymmetric Loadings
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...


