Handgrip strength and asymmetry are associated with lower-body muscle power in older women.

IF 1.2 4区 医学 Q3 SPORT SCIENCES
Ty B Palmer
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引用次数: 0

Abstract

Background: The difference in strength between hands, as characterized by handgrip asymmetry, has been shown to be significantly associated with several adverse health outcomes. Handgrip strength asymmetry and its relationship with lower-body muscle power in older adults is not well understood. This study aimed to determine if handgrip strength and asymmetry are associated with lower-body muscle power in older women.

Methods: Twenty active older women (67±5 years) participated in this study. Handgrip contractions were performed with the dominant and non-dominant hand to assess strength measurements of peak force, peak rate of force development (RFD), and RFD at 0-100 (RFD100) and 0-200 (RFD200) ms. Asymmetry ratios were used to determine the severity of differences in handgrip peak force and RFD measurements between the dominant and non-dominant hand. Lower-body peak muscle power was assessed from a vertical jump test.

Results: All handgrip peak force and RFD measurements for the dominant and non-dominant hands were significantly associated with vertical jump peak power (r=0.445-0.547, P=0.013-0.049). Significant correlations were observed between vertical jump peak power and handgrip asymmetry ratios for peak RFD (r=-0.460, P=0.041) and RFD100 (r=-0.591, P=0.006). Multiple regression analysis indicated that handgrip RFD100 asymmetry ratio and RFD200 for the dominant hand were significant predictors of vertical jump peak power, and together, explained 53.9% of its variance.

Conclusions: These findings suggest that handgrip RFD and asymmetry may be effective measurements at predicting lower-body muscle power in older women.

老年女性握力和不对称与下半身肌肉力量有关。
背景:以握持不对称为特征的双手力量差异已被证明与几种不良健康结果显著相关。老年人握力不对称及其与下半身肌力的关系尚不清楚。这项研究旨在确定老年女性的握力和不对称性是否与下半身肌肉力量有关。方法:20名年龄在67±5岁的活跃老年妇女参加本研究。在0-100 ms (RFD100)和0-200 ms (RFD200)时,用优势手和非优势手进行握力收缩,以评估峰值力、峰值力发展率(RFD)和RFD的强度测量结果。通过垂直跳跃测试评估下半身峰值肌肉力量。结果:所有优势手和非优势手的握力峰值和RFD测量值与垂直跳跃峰值功率显著相关(r=0.445 ~ 0.547, P=0.013 ~ 0.049)。垂直跳跃峰值功率与RFD峰值和RFD100的握力不对称比(r=-0.460, P=0.041)和rd100 (r=-0.591, P=0.006)呈显著相关。多元回归分析表明,手握RFD100不对称比和优势手RFD200是垂直起跳峰值功率的显著预测因子,共同解释了53.9%的方差。结论:这些发现表明,握力RFD和不对称性可能是预测老年女性下半身肌肉力量的有效指标。
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来源期刊
CiteScore
2.90
自引率
5.90%
发文量
393
审稿时长
6-12 weeks
期刊介绍: The Journal of Sports Medicine and Physical Fitness publishes scientific papers relating to the area of the applied physiology, preventive medicine, sports medicine and traumatology, sports psychology. Manuscripts may be submitted in the form of editorials, original articles, review articles, case reports, special articles, letters to the Editor and guidelines.
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