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Older adults utilize less efficient postural control when performing pushing task.

Yun-Ju Lee¹, Bing Chen¹, Alexander S Aruin¹

¹University of Illinois at Chicago, Chicago, IL 60612, United States.

Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology

|September 26, 2015

Summary

This summary is machine-generated.

Older adults exhibit poorer postural control, with delayed muscle responses and center of pressure (COP) shifts during object pushing tasks. This age-related decline in anticipatory (APA) and compensatory (CPA) postural adjustments may increase fall risk.

Keywords:

Aging Anticipatory Compensatory Muscle activity Pushing

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Area of Science:

Gerontology
Biomechanics
Neuroscience

Background:

Postural balance declines with age, impacting functional mobility.
Understanding age-related changes in postural adjustments is crucial for fall prevention.

Purpose of the Study:

To investigate how age influences anticipatory (APA) and compensatory (CPA) postural adjustments during a pushing task.
To compare the postural control strategies of older and young adults.

Main Methods:

Participants (older and young adults) pushed an object (ceiling pendulum) with both hands.
Electromyography (EMG) of leg and trunk muscles and center of pressure (COP) displacements were recorded.
Analysis included muscle onset times, activity integrals, COP displacements, and muscle activation indexes.

Main Results:

Older adults demonstrated delayed APA muscle onset times and COP displacements compared to young adults.
Older adults exhibited increased muscle co-activation during CPA, while young adults used reciprocal activation.
These findings indicate less efficient postural control in older adults.

Conclusions:

Age-related deficits in APA and CPA reduce postural control efficiency during pushing tasks.
Impaired postural adjustments in older adults may elevate their risk of falls.
Further research can optimize daily activities for older adults based on these findings.