Department of Health, Nutrition, and Exercise Science, North Dakota State University, Fargo, ND, USA; Fargo VA Healthcare System, Fargo, ND, USA.
Centre for Surveillance and Applied Research, Public Health Agency of Canada, Ottawa, ON, Canada; School of Mathematics and Statistics, Carleton University, Ottawa, ON, Canada.
Arch Gerontol Geriatr. 2022 Sep-Oct;102:104716. doi: 10.1016/j.archger.2022.104716. Epub 2022 May 7.
Handgrip strength (HGS) asymmetry may help identify the functional asymmetries that contribute to mobility limitations. We sought to determine the associations of HGS asymmetry on gait speed and standing balance in older Americans.
The analytic sample included 8,396 adults aged ≥65-years for the last wave in which they participated in the 2006-2016 Health and Retirement Study. Participants were categorized into asymmetry groups based on the degree of HGS asymmetry. Persons with gait speed <0.8 meters/second were slow. Balance scores ranged from 0-4 with lower scores representing poorer standing balance.
Older Americans with 20.1%-30.0% asymmetry had 1.22 (95% confidence interval (CI): 1.05-1.42) greater odds for slow gait speed, while those with >30.0% asymmetry had 1.23 (CI: 1.05-1.44) greater odds. Persons with 10.1%-20.0%, 20.1%-30.0%, and >30% asymmetry had 1.09 (CI: 1.07-1.22), 1.23 (CI: 1.07-1.42) and 1.40 (CI: 1.22-1.61) greater odds for poorer static balance, respectively. Those in each individual asymmetry group had greater odds for slow gait speed: 1.14 (CI: 1.03-1.26) for >10.0%, 1.19 (CI: 1.07-1.33) for >20.0%, and 1.16 (CI: 1.01-1.35) for >30.0%. Similar results were observed for poorer balance: 1.20 (CI: 1.09-1.32) for >10.0%, 1.27 (CI: 1.15-1.41) for >20.0%, and 1.31 (CI: 1.16-1.49) for >30.0%. Every 10% asymmetry increase was associated with 1.62 (CI: 1.32-1.99) greater odds for poorer balance.
The bimanual aspects of HGS asymmetry may reflect the bilateral movements required for mobility, and the relationship between upper and lower extremity strength and function may elucidate our findings.
握力强度（HGS）不对称性可能有助于确定导致移动能力受限的功能不对称性。我们旨在确定老年人 HGS 不对称性与步态速度和站立平衡之间的关联。
分析样本包括最后一波参加 2006-2016 年健康与退休研究的 8396 名年龄≥65 岁的成年人。参与者根据 HGS 不对称程度分为不对称组。步态速度<0.8 米/秒的人速度较慢。平衡评分范围为 0-4，分数越低表示站立平衡越差。
HGS 不对称性为 20.1%-30.0%的美国老年人，其步态速度较慢的可能性高 1.22（95%置信区间（CI）：1.05-1.42），而 HGS 不对称性>30.0%的可能性高 1.23（CI：1.05-1.44）。10.1%-20.0%、20.1%-30.0%和>30%不对称性的人静态平衡能力分别差 1.09（CI：1.07-1.22）、1.23（CI：1.07-1.42）和 1.40（CI：1.22-1.61）的可能性更大。处于每个个体不对称组的人，步态速度较慢的可能性更高：>10.0%的可能性为 1.14（CI：1.03-1.26），>20.0%的可能性为 1.19（CI：1.07-1.33），>30.0%的可能性为 1.16（CI：1.01-1.35）。对于平衡能力较差的人，也观察到了类似的结果：>10.0%的可能性为 1.20（CI：1.09-1.32），>20.0%的可能性为 1.27（CI：1.15-1.41），>30.0%的可能性为 1.31（CI：1.16-1.49）。HGS 不对称性每增加 10%，平衡能力较差的可能性就会增加 1.62（CI：1.32-1.99）。
HGS 不对称性的双手方面可能反映了移动所需的双侧运动，上肢和下肢力量与功能之间的关系可能阐明了我们的发现。
