Department of Health and Rehabilitation Sciences, Prince Sattam bin Abdulaziz University, Alkharj, Saudi Arabia.
Eur Rev Med Pharmacol Sci. 2024 May;28(10):3493-3502. doi: 10.26355/eurrev_202405_36283.
This study explored the correlation between body mass index (BMI) and knee angle during ascending and descending stairs in healthy young adults. The hypothesis was that higher BMI would be associated with altered knee angles during stair ambulation.
Participants' (n = 43) demographic characteristics, including age, height, weight, BMI, leg preference, and thigh lengths, were recorded. Gait parameters, such as cycle duration, stride phase, velocity, and knee angles, were analyzed using Kinovea® software. Inferential statistical tests, including ANOVA, t-tests, and correlation analysis, were performed to explore the relationships and differences between variables.
No significant effect of BMI on knee angle was found [ascending stairs: F (2, 40) = 0.75, p = 0.47; descending stairs: F (2, 40) = 0.58, p = 0.56]. However, gait parameters differed significantly, with shorter cycle duration during ascending stairs (M = 4.52 s, SD = 0.76 s) compared to descending stairs (M = 4.72 s, SD = 0.81 s). The stride phase varied across BMI categories [F (2, 40) = 3.82, p < 0.05], with the ideal weight group (M = 47.12%, SD = 3.21%) exhibiting a distinct stride phase. Positive correlations were found between knee angle and thigh length difference during ascending (r = 0.42, p < 0.05) and descending stairs (r = 0.38, p < 0.05).
This study demonstrated that BMI did not significantly affect knee angle during stair ambulation. However, gait parameters such as cycle duration, stride phase, and velocity differed between ascending and descending stairs. The positive correlation between knee angle and thigh length difference suggests that individuals with more significant thigh length differences may exhibit larger knee angles during stair climbing. The findings of this study have clinical implications for rehabilitation programs and the design of assistive devices. Understanding the relationship between BMI, thigh length difference, and knee angle during stair climbing can help clinicians better assess and manage gait abnormalities in individuals navigating stairs.
本研究旨在探讨健康年轻成年人在上下楼梯时，体重指数（BMI）与膝关节角度之间的相关性。假设是，较高的 BMI 与楼梯行走时膝关节角度的改变有关。
记录参与者（n=43）的人口统计学特征，包括年龄、身高、体重、BMI、腿偏好和大腿长度。使用 Kinovea®软件分析步态参数，如周期时间、步幅阶段、速度和膝关节角度。采用方差分析（ANOVA）、t 检验和相关分析等推断性统计检验方法，探讨变量之间的关系和差异。
BMI 对膝关节角度无显著影响[上楼梯：F（2, 40）=0.75，p=0.47；下楼梯：F（2, 40）=0.58，p=0.56]。然而，步态参数差异显著，上楼梯时周期时间较短（M=4.52 秒，SD=0.76 秒），下楼梯时周期时间较长（M=4.72 秒，SD=0.81 秒）。BMI 类别之间的步幅阶段也存在差异[F（2, 40）=3.82，p<0.05]，理想体重组（M=47.12%，SD=3.21%）表现出明显的步幅阶段。在上楼梯（r=0.42，p<0.05）和下楼梯（r=0.38，p<0.05）时，膝关节角度与大腿长度差呈正相关。
本研究表明，BMI 在上楼梯时对膝关节角度没有显著影响。然而，在上下楼梯时，周期时间、步幅阶段和速度等步态参数存在差异。膝关节角度与大腿长度差之间的正相关表明，大腿长度差异较大的个体在爬楼梯时可能会出现更大的膝关节角度。本研究的结果对康复计划和辅助设备的设计具有临床意义。了解在上下楼梯时 BMI、大腿长度差和膝关节角度之间的关系，可以帮助临床医生更好地评估和管理上下楼梯时的步态异常。
