Langford Matthew, Hackney Kyle J, Andrew Sarah, Batesole Joshua, Berntson Maren, Black Kennedy, Hoang Tyler, Klawitter Lukus, Kraemer William J, McGrath Ryan
Healthy Aging North Dakota, North Dakota State University, Fargo, ND, USA.
Department of Health, Nutrition, and Exercise Sciences, North Dakota State University, Fargo, ND, USA.
Int J Exerc Sci. 2024 Aug 1;17(4):1155-1166. doi: 10.70252/OWOW3940. eCollection 2024.
Electronic handgrip dynamometry allows for multiple muscle function aspects to be feasibly measured, yet their relationship with lower extremity muscle function is unknown. We sought to determine the relationships between upper and lower extremity mechanical isometric muscle strength, rate of force development (RFD), and endurance by limb dominance in resistance trained adults. The analytic sample included 30 adults aged 32.1 ± 13.5 years. An electronic handgrip dynamometer ascertained upper extremity strength capacity, RFD, and endurance. Lower extremity strength, RFD, and endurance were collected with the isometric feature on an isokinetic knee dynamometer. Limb dominance was self-reported. Pearson correlations were used for the analyses. Each muscle function attribute on the dominant limb of the upper and lower extremities were correlated: = 0.76 ( < 0.01) for strength, = 0.37 ( = 0.04) for RFD, and = -0.48 ( < 0.01) for endurance. Although strength from the non-dominant limbs were correlated ( = 0.67; < 0.01), no significant correlations were observed for RFD ( = 0.20; = 0.29) and endurance ( = -0.21; = 0.26). For adults aged 18-34 years, only upper and lower extremity strength was correlated on the dominant ( = 0.69; < 0.01) and non-dominant limbs ( = 0.75; < 0.01); however, strength ( = 0.88; < 0.01) and endurance ( = -0.68; = 0.01) were correlated in adults aged 35-70 years. Upper and lower extremity fatigability was likewise correlated in females ( = -0.56; = 0.01). Our findings suggest that electronic handgrip dynamometry derived strength, RFD, and endurance could be a whole-body indicator of these muscle function attributes given their relationships with the lower extremities. These findings underscore the promise of handgrip dynamometry in routine muscle function assessments across different age groups.
电子握力计能够切实测量多个肌肉功能方面，但它们与下肢肌肉功能的关系尚不清楚。我们试图确定在接受抗阻训练的成年人中，上肢和下肢的机械等长肌力、力量发展速率（RFD）以及耐力之间的关系，并按肢体优势进行分析。分析样本包括30名年龄在32.1±13.5岁的成年人。使用电子握力计确定上肢的力量能力、RFD和耐力。使用等速膝关节测力计的等长功能收集下肢的力量、RFD和耐力数据。肢体优势通过自我报告确定。分析采用Pearson相关性分析。对上肢和下肢优势肢体的各项肌肉功能属性进行相关性分析：力量方面，r = 0.76（p < 0.01）；RFD方面，r = 0.37（p = 0.04）；耐力方面，r = -0.48（p < 0.01）。虽然非优势肢体的力量存在相关性（r = 0.67；p < 0.01），但RFD（r = 0.20；p = 0.29）和耐力（r = -0.21；p = 0.26）未观察到显著相关性。对于18 - 34岁的成年人，仅上肢和下肢优势肢体的力量存在相关性（r = 0.69；p < 0.01），非优势肢体的力量也存在相关性（r = 0.75；p < 0.01）；然而，在35 - 70岁的成年人中，力量（r = 0.88；p < 0.01）和耐力（r = -0.68；p = 0.01）存在相关性。女性的上肢和下肢疲劳性同样存在相关性（r = -0.56；p = 0.01）。我们的研究结果表明，鉴于电子握力计所测得的力量、RFD和耐力与下肢的关系，它们可能是这些肌肉功能属性的全身指标。这些发现凸显了握力计在不同年龄组常规肌肉功能评估中的前景。
