|关键词: 髌股关节疼痛 楼梯行走 髌股关节力学特征 冲量
|Effect of Patellofemoral Joint Pain on the Mechanical Characteristics of Patellofemoral Joint during Stair Walking in the Older Adults
|CHEN Genyan,ZHU Xuanmin,ZHANG Jinling,ZHUANG Shiyang,ZHOU Hongmei
|(Chengyi College, Jimei University，Xiamen 361000 , China;Silpakorn University，Bangkok 10220, Thailand;Ninghua No. 6 Middle School，Ninghua 365400 , China;Jinjiang Qiaosheng Middle School，Jinjiang 362271 , China;Fujian Normal University，Fuzhou 350007 , China)
|Objectives: This paper observed the effect of patellofemoral pain (PFP) on the mechanical characteristics of patellofemoral joint in the older adults during stair walking, and provided theoretical support for the formulation of reasonable intervention strategies for the elderly with PFP. Methods: Twenty-two healthy older adults and 22 PFP older adults were randomly recruited. The Qualisys Motion Capture System and AMTI OR6 Series were used to simultaneously collect the kinematics and dynamics data of the two groups of subjects during stair walking. The patellofemoral joint contact force and impulse, patellofemoral joint stress and impulse were used to quantitatively evaluate the patellofemoral joint mechanical characteristics of the elderly during stair walking. Results: Compared with the healthy group, the PFP group showed smaller patellofemoral joint contact force impulse (P=0.030), patellofemoral joint stress (P=0.024) and impulse (P=0.004) when going up the stairs, and showed larger knee flexion angle peak (P=0.022) and smaller patellofemoral joint stress impulse (P=0.067) when going down the stairs. There was no significant difference in other indicators (P＞0.05). Conclusions: The PFP older adults showed less mechanical characteristics of the patellofemoral joint during stair walking, especially during stair climbing, which may be a self-protection strategy actively adopted by the PFP elderly to provide sufficient lower limb support and reduce the load of the patellofemoral joint. Suggestions: The PFP older adults pay attention to the exercise of lower limb muscles, especially the quadriceps femoris. At the same time, more sensitive patellofemoral joint contact force impulse and stress impulse are used to evaluate the patellofemoral joint load during stair walking.
|Key words: patellofemoral joint pain stair walking patellofemoral joint mechanical characteristics impulse