Aging and Gait Function: Examination of Multiple Factors that Influence Gait Variability

Area of Science:

• Gerontology
• Biomechanics
• Motor Control

Background:

• Gait variability increases with age, contributing to functional decline and falls in older adults.
• Ankle muscle strength and control are critical for maintaining stable gait.
• Understanding the relationship between muscle function and gait parameters is essential for targeted interventions.

Purpose of the Study:

• To identify specific parameters of reduced ankle muscle functionality linked to gait cycle variations in older adults.
• To compare muscle force production and variability between older and younger adults.
• To investigate the correlation between physical activity levels, muscle strength, and gait quality in aging.

Main Methods:

• Recruitment of young (18-40 years) and older (55-85 years) adult cohorts.
• Assessment of maximal and submaximal dorsiflexor (DF) and plantar flexor (PF) muscle force.
• Analysis of walking trials to measure spatiotemporal gait parameters and variability.
• Administration of questionnaires to assess physical activity levels.

Main Results:

• Older adults demonstrated significantly lower maximal force production in both DF and PF muscles compared to younger adults.
• Increased force variability was observed in older adults for both DF and PF muscles.
• Reduced muscle strength and increased force variability correlated with deficits in spatiotemporal gait parameters, suggesting age-related motor control decline.
• Physical activity level was significantly correlated with muscle strength and gait parameters.

Conclusions:

• Age-related decline in ankle muscle strength and increased force variability contribute to gait disturbances.
• Physical activity plays a vital role in preserving gait quality and maintaining independence in older adults.
• These findings highlight the importance of physical activity for fall prevention strategies in geriatric populations.