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Related Experiment Video

Updated: Jun 29, 2026

Asymmetric Walkway: A Novel Behavioral Assay for Studying Asymmetric Locomotion

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Published on: January 15, 2016

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

Kyung-Mi Park¹, Olga Kim^1,2, Eun Young Seo¹

¹Bionics Research Center, Korea Institute of Science and Technology, Seoul, South Korea.

European Journal of Applied Physiology

|September 17, 2025

Summary

Older adults demonstrate reduced pivoting neuromuscular control during stepping tasks, exhibiting slower speeds and greater instability. This age-related decline in control may increase injury risk.

Keywords:

Aging Entropy Pivoting Pivoting instability Stepping

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Area of Science:

Biomechanics
Gerontology
Neuroscience

Background:

Age-related physiological changes impact neuromuscular control, increasing fall risk in older adults.
Pivoting neuromuscular control is crucial for dynamic balance and mobility during stepping tasks.

Purpose of the Study:

To investigate age-related differences in pivoting neuromuscular control during stepping.
To assess how aging affects stepping speed, pivoting instability, and electromyography (EMG) signal complexity.

Main Methods:

Twenty-three healthy participants (12 young, 11 older) performed stepping tasks with controlled pivoting motion.
Stepping speed, pivoting instability, and entropy of time to peak EMG in lower extremity muscles were measured.
Data were compared between young and older adult groups.

Main Results:

Older adults exhibited significantly lower stepping speed compared to young adults.
Older adults demonstrated significantly greater pivoting instability during the stepping task.
Higher entropy of time to peak EMG was observed in older adults, indicating less predictable muscle activation.

Conclusions:

Older adults have diminished pivoting neuromuscular control abilities compared to younger individuals.
Age-related deficits in pivoting control may be a risk factor for injuries in older populations.
Findings contribute to understanding age-related functional limitations and fall prevention strategies.