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Age differences in hand grip power in the elderly.

Hiroki Aoki¹, Shinichi Demura

¹Kanazawa University Graduate School of Natural Science and Technology, Kakuma, Kanazawa, Ishikawa 920-1192, Japan. hiroki.a@ed.kanazawa-u.ac.jp

Archives of Gerontology and Geriatrics

|December 7, 2010

Summary

This summary is machine-generated.

Younger women exhibit greater hand grip power and faster peak velocity compared to elderly women. Age-related decline in muscle tensile strength significantly impacts hand grip performance.

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Area of Science:

Gerontology
Biomechanics
Human Physiology

Background:

Hand grip strength is a key indicator of overall physical health and functional capacity.
Age-related changes in muscle mass and neural activation can influence grip strength.
Understanding these age-level differences is crucial for assessing health and designing interventions.

Purpose of the Study:

To investigate the age-level differences in hand grip power and peak velocity in healthy young and elderly females.
To determine the influence of maximum voluntary contraction (MVC) and load intensity on grip performance across age groups.

Main Methods:

Comparison of hand grip power and peak velocity between young (mean age 21.5 years) and elderly (mean age 65.0 years) female groups.
Measurement of dominant hand peak velocity under three relative loads (30%, 40%, 50% MVC).
Analysis of MVC, grip power, and time to reach peak velocity.

Main Results:

Younger females demonstrated significantly greater MVC and hand grip power than elderly females.
Peak velocity differed significantly between age groups across all tested loads, being faster in younger women.
The time to reach peak velocity at 50% MVC was longer in elderly females, while at 30% MVC it was shorter in both groups compared to higher loads.

Conclusions:

Age-level differences in hand grip power, particularly under relative loads, are more influenced by MVC than velocity in females.
A decrease in muscle tensile strength related to hand grip movement is a significant factor in age-related grip performance decline.
Findings highlight the importance of MVC in understanding age-related changes in hand grip function.