Mahoney Sean, Klawitter Lukus, Hackney Kyle J, Dahl Lindsey, Herrmann Stephen D, Edwards Bradley, McGrath Ryan
Department of Health, Nutrition, and Exercise Sciences, North Dakota State University, Fargo, ND 58108, USA.
Sanford Health, Fargo, ND 58103, USA.
Geriatrics (Basel). 2020 Oct 31;5(4):86. doi: 10.3390/geriatrics5040086.
Background Maximal handgrip strength (HGS) could be an incomplete and unidimensional measure of muscle function. This pilot study sought to examine the relationships between maximal HGS, radial and ulnar digit grip strength, submaximal HGS force control, HGS fatigability, neuromuscular HGS steadiness, and HGS asymmetry in older adults. Methods: A digital handgrip dynamometer and accelerometer was used to collect several HGS measurements from 13 adults aged 70.9 ± 4.0 years: maximal strength, radial and ulnar digit grip strength, submaximal force control, fatigability, neuromuscular steadiness, and asymmetry. Pearson correlations determined the relationships between individual HGS measurements. A principal component analysis was used to derive a collection of new uncorrelated variables from the HGS measures we examined. Results: The individual HGS measurements were differentially correlated. Maximal strength (maximal HGS, radial digit strength, ulnar digits strength), contractile steadiness (maximal HGS steadiness, ulnar digit grip strength steadiness), and functional strength (submaximal HGS force control, HGS fatigability, HGS asymmetry, HGS fatigability steadiness) emerged as dimensions from the HGS measurements that we evaluated. : Our findings suggest that these additional measures of muscle function may differ from maximal HGS alone. Continued research is warranted for improving how we assess muscle function with more modern technologies, including handgrip dynamometry and accelerometry.
最大握力（HGS）可能是肌肉功能的一种不完整且单一维度的测量方法。这项初步研究旨在探讨老年人的最大HGS、桡侧和尺侧手指握力、次最大HGS力控制、HGS疲劳性、神经肌肉HGS稳定性以及HGS不对称性之间的关系。方法：使用数字握力计和加速度计从13名年龄为70.9±4.0岁的成年人中收集多项HGS测量值：最大力量、桡侧和尺侧手指握力、次最大力量控制、疲劳性、神经肌肉稳定性和不对称性。皮尔逊相关性分析确定了各个HGS测量值之间的关系。主成分分析用于从我们所研究的HGS测量值中导出一组新的不相关变量。结果：各个HGS测量值之间的相关性各不相同。最大力量（最大HGS、桡侧手指力量、尺侧手指力量）、收缩稳定性（最大HGS稳定性、尺侧手指握力稳定性）和功能力量（次最大HGS力控制、HGS疲劳性、HGS不对称性、HGS疲劳性稳定性）从我们评估的HGS测量值中呈现为不同维度。我们的研究结果表明，这些肌肉功能的额外测量指标可能与仅测量最大HGS有所不同。有必要继续开展研究，以改进我们如何利用包括握力计和加速度计在内的更现代技术来评估肌肉功能。
