Department of Physical Therapy, University of Delaware, Newark, DE 19711, USA.
Med Sci Sports Exerc. 2011 Apr;43(4):560-7. doi: 10.1249/MSS.0b013e3181f3f3ab.
Age-related differences in force steadiness have been extensively examined and used as an index of motor function. However, the functional relevance of steadiness remains unclear.
The aim here was to evaluate the relations among hand strength, steadiness, and function across the adult life span.
Seventy-five adults (45 women; 18-89 yr) performed three strength, two steadiness, and four functional tests with both hands. Strength was measured during index finger abduction, precision pinch, and handgrip, and steadiness was measured during index finger abduction and precision pinch. Functional tests included the Grooved Pegboard test, the game Operation™, a scissor task, and a tracing task.
Moderate correlations were observed between both steadiness tasks and performance on the Grooved Pegboard test (R(2) = 0.57 and R(2) = 0.46, respectively) and Operation™ (R(2) = -0.47 and R(2) = -0.57, respectively).
The relation between measures of steadiness and hand function suggests that the physiological mechanisms responsible for differences in steadiness also contribute to differences in the performance of fine motor tasks with the hand.
人们广泛研究了与年龄相关的力量稳定性差异，并将其用作运动功能的指标。然而，稳定性的功能相关性尚不清楚。
本研究旨在评估整个成年期手力量、稳定性和功能之间的关系。
75 名成年人（女性 45 名；18-89 岁）分别用双手完成了三项力量测试、两项稳定性测试和四项功能测试。力量通过食指外展、精准捏合和手握力来测量，而稳定性则通过食指外展和精准捏合来测量。功能测试包括槽形钉板测试、游戏 Operation™、剪纸任务和描线任务。
两个稳定性任务与槽形钉板测试（R²=0.57 和 R²=0.46）和 Operation™（R²=-0.47 和 R²=-0.57）的表现之间存在中度相关性。
稳定性测量与手部功能之间的关系表明，导致稳定性差异的生理机制也对手部精细运动任务的表现产生影响。
