Age-related differences in pivoting neuromuscular control during a stepping task.

IF 2.7 3区医学 Q2 PHYSIOLOGY

European Journal of Applied Physiology Pub Date : 2025-09-17 DOI:10.1007/s00421-025-05986-w

Kyung-Mi Park, Olga Kim, Eun Young Seo, Duguma Teshome Gemechu, Song Joo Lee

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引用次数: 0

Abstract

Purpose: Age-related physiological changes affect neuromuscular control, potentially increasing functional limitations and fall risk among older adults. The aim of this study was to investigate how age affects various aspects related to pivoting neuromuscular control during stepping tasks, such as stepping speed, pivoting instability, and entropy of time to peak electromyography (EMG) in lower extremity muscles.

Methods: Twenty-three healthy individuals (12 young and 11 older) participated in this study. Participants performed stepping tasks on a modified stepper that allowed pivoting motion, defined as rotational movement in the transverse plane at the knee joint (i.e., tibial rotation relative to the femur). When performing stepping tasks while controlling a pivoting motion, stepping speeds, pivoting instability, and entropy of time to peak EMG of lower extremity muscles were assessed and compared between young and older groups.

Results: The older group showed significantly lower stepping speed (p < 0.05), greater pivoting instability (p < 0.05), and higher entropy of time to peak EMG (p < 0.05), compared to the young group.

Conclusion: Older adults exhibited lower ability in pivoting neuromuscular control compared with the young individuals during the stepping task. These findings may enhance our understanding of the potential risk factors for injury associated with age-related differences in pivoting neuromuscular control.

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跨步任务中旋转神经肌肉控制的年龄相关差异。

目的：年龄相关的生理变化影响神经肌肉控制，可能增加老年人的功能限制和跌倒风险。本研究的目的是研究年龄如何影响步进任务中与旋转神经肌肉控制相关的各个方面，如步进速度、旋转不稳定性和下肢肌肉肌电图（EMG）峰值时间熵。方法：23名健康个体（12名青少年，11名老年人）参加了本研究。参与者在允许旋转运动的改良步进器上执行步进任务，定义为膝关节横向平面上的旋转运动（即胫骨相对于股骨的旋转）。在控制旋转运动的同时执行步进任务时，评估并比较了年轻组和老年组的步进速度、旋转不稳定性和到达下肢肌电图峰值的时间熵。结果：老年组的步速明显低于青年组。结论：老年组在步速任务中的神经肌肉旋转控制能力明显低于青年组。这些发现可能增强我们对与年龄相关的旋转神经肌肉控制差异相关的潜在损伤危险因素的理解。

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

European Journal of Applied Physiology 医学-生理学

CiteScore

6.00

自引率

6.70%

发文量

227

审稿时长

3 months

期刊介绍： The European Journal of Applied Physiology (EJAP) aims to promote mechanistic advances in human integrative and translational physiology. Physiology is viewed broadly, having overlapping context with related disciplines such as biomechanics, biochemistry, endocrinology, ergonomics, immunology, motor control, and nutrition. EJAP welcomes studies dealing with physical exercise, training and performance. Studies addressing physiological mechanisms are preferred over descriptive studies. Papers dealing with animal models or pathophysiological conditions are not excluded from consideration, but must be clearly relevant to human physiology.