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Rehabilitation Practice and Science

Translated Title

年齡老化在下肢爆發力的生物力學分析

Abstract

Background: The aging process may contribute to a decrease in lower extremity function in elderly individuals, which in turn often causes a functional decrease in activities of daily living, loss in quality of life, and increase in risk of accidental falls. In the last few decades, numerous studies in elderly individuals have reported the relation between a high incidence of accidental falls and inadequate muscle strength. Unfortunately, few studies have provided insight about their individual muscle performance, such as the explosive muscle power, from a biomechanical prospective. Quantitative analysis of the sit- to- stand (STS) ability is a useful method in evaluating falling risk in elderly individuals. Purpose: To compare explosive muscle power in lower limbs during an STS test among elderly individuals who had an accidental fall in the past year, elderly individuals who did not have a fall, and young adults. Methods: Forty-two subjects volunteering to participate in this study were placed into one of the following groups: healthy elderly individuals without any falls (n=17), elderly individuals who had an accidental fall (n=10), and young adults (n=15). A single- axis force plate, data acquisition system and LabVIEW software were used to evaluate the biomechanical parameters in each group. One-way ANOVA and Scheffe multiple comparisons were used to measure the kinetic and time parameters of STS ability. The statistical significance was set at p＜0.05. Results: Values of kinetic parameters (maximum vertical ground reaction force, loading response, normalized explosive power, and rising peak- to- peak amplitude) of the healthy and accidental fall groups of elderly individuals were lower than that of the young adult group. Values of time parameters (total time, reaction time, stabilization time) of the healthy and accidental fall groups of elderly individuals were longer than that of the young adult group. Conclusion: This study presents differences in the kinetics parameters between three groups from a biomechanical prospective. Deterioration of strength and explosive power in the lower extremities might lead to a higher incidence of accidental falls in elderly individuals.

Language

Traditional Chinese

First Page

147

Last Page

152

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