Biomechanical effects of loading methods on the patellofemoral joint during stair climbing: based on statistical parametric mapping analysis.

IF 4.3 3区工程技术 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Frontiers in Bioengineering and Biotechnology Pub Date : 2025-06-09 eCollection Date: 2025-01-01 DOI:10.3389/fbioe.2025.1617823

Hongwen Zhang, Xingchen Zhang, Jing Ma, Na Sun, Litai Zhang, Yuan Gao

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引用次数: 0

Abstract

Introduction: Stair negotiation with external loads imposes substantial demands on the structural and functional integrity of the patellofemoral joint. Current research predominantly focuses on singular loading modalities or level walking conditions, often employing discrete time-point comparisons. This study innovatively employs Statistical Parametric Mapping (SPM) to systematically analyze patellofemoral biomechanical characteristics during stair negotiation with different load-carrying strategies.

Methods: Twenty healthy males performed stair negotiation tasks under shoulder-load carriage (SLC) and hand-carry carriage (HCC) conditions (15 kg). Kinematic (200 Hz), kinetic (2000 Hz), and electromyographic (2000 Hz) data were synchronized to compute patellofemoral joint stress(PFJS), center of pressure (COP) trajectories, and muscle co-activation indices across stair phases.

Results: HCC generated significantly greater patellofemoral joint stress during most stair phases compared to SLC (P < 0.05), while SLC exhibited transient stress elevation only during initial double-support phase.

Discussion: HCC particularly increased joint stress during single-support and second double-support phases, with concomitant increases in COP displacement distances and reduced lower-limb co-cativation indices (CCI) collectively compromising joint stability. Despite transient stress spikes during initial double-support, SLC maintained kinetic chain equilibrium through shorter external moment arms. These findings recommend prioritizing proximal symmetric loading modes complemented by targeted vastus medialis training to enhance patellar stability, thereby reducing both patellofemoral joint stress concentrations and low back pain risks.

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爬楼梯时载荷方式对髌股关节的生物力学影响：基于统计参数映射分析。

在楼梯上负重行走对髌股关节的结构和功能完整性有很大的要求。目前的研究主要集中在单一负载模式或水平行走条件下，通常采用离散时间点比较。本研究创新性地采用统计参数映射（SPM）系统分析了不同负重策略下爬楼梯时髌骨的生物力学特征。方法：20名健康男性在肩扛（SLC）和手扛（HCC）（15 kg）条件下进行楼梯行走任务。运动学（200 Hz）、动力学（2000 Hz）和肌电图（2000 Hz）数据同步计算髌股关节应力（PFJS）、压力中心（COP）轨迹和跨楼梯阶段的肌肉共激活指数。结果：与SLC相比，HCC在大多数楼梯阶段产生更大的髌股关节应力（P < 0.05），而SLC仅在初始双支撑阶段表现出短暂的应力升高。讨论：HCC在单支撑和第二双支撑阶段尤其增加关节应力，伴随COP位移距离增加和下肢共活化指数（CCI）减少，共同影响关节稳定性。尽管在最初的双支撑过程中出现了短暂的应力峰值，但SLC通过较短的外部力臂维持了动力学链平衡。这些发现建议优先考虑近端对称负荷模式，辅以针对性的股内侧肌训练，以增强髌骨稳定性，从而降低髌股关节应力集中和腰痛风险。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frontiers in Bioengineering and Biotechnology Chemical Engineering-Bioengineering

CiteScore

8.30

自引率

5.30%

发文量

2270

审稿时长

12 weeks

期刊介绍： The translation of new discoveries in medicine to clinical routine has never been easy. During the second half of the last century, thanks to the progress in chemistry, biochemistry and pharmacology, we have seen the development and the application of a large number of drugs and devices aimed at the treatment of symptoms, blocking unwanted pathways and, in the case of infectious diseases, fighting the micro-organisms responsible. However, we are facing, today, a dramatic change in the therapeutic approach to pathologies and diseases. Indeed, the challenge of the present and the next decade is to fully restore the physiological status of the diseased organism and to completely regenerate tissue and organs when they are so seriously affected that treatments cannot be limited to the repression of symptoms or to the repair of damage. This is being made possible thanks to the major developments made in basic cell and molecular biology, including stem cell science, growth factor delivery, gene isolation and transfection, the advances in bioengineering and nanotechnology, including development of new biomaterials, biofabrication technologies and use of bioreactors, and the big improvements in diagnostic tools and imaging of cells, tissues and organs. In today`s world, an enhancement of communication between multidisciplinary experts, together with the promotion of joint projects and close collaborations among scientists, engineers, industry people, regulatory agencies and physicians are absolute requirements for the success of any attempt to develop and clinically apply a new biological therapy or an innovative device involving the collective use of biomaterials, cells and/or bioactive molecules. “Frontiers in Bioengineering and Biotechnology” aspires to be a forum for all people involved in the process by bridging the gap too often existing between a discovery in the basic sciences and its clinical application.