Trampisch Ulrike Sonja, Franke Julia, Jedamzik Nina, Hinrichs Timo, Platen Petra
Department of Medical Informatics, Biometry and Epidemiology, Ruhr-University Bochum, Bochum, Germany.
J Hand Surg Am. 2012 Nov;37(11):2368-73. doi: 10.1016/j.jhsa.2012.08.014.
Hand grip strength is an indicator of general muscle strength that is measured using a hand dynamometer. In some studies, a subject's grip strength is taken to be the maximal grip strength achieved from measurements taken at several different dynamometer handle positions. However, little is known about the influence of these different positions on the measured grip strength. The aim of the study was to identify one standard handle position that could be used to assess the grip strength of all subjects.
Grip strength was assessed with a hand dynamometer (Jamar Plus+; Sammons Preston, Rolyon, Bolingbrook, IL). Each participant's grip strength was measured 3 times in each of 5 different handle positions with each hand. The best position for each participant was defined as the position at which they achieved maximal grip strength.
The mean (± standard deviation) age of the 50 participants was 41 (± 13) years. Maximal grip strength was 43.7 (± 12.4) kg for all participants; 55.0 (± 10.2) kg for men and 35.4 (± 5.2) kg for women. Handle position 2 was the best position for 70% of participants. The mean difference between the grip strength achieved by each participant at handle position 2 and that achieved at each participant's best position was 0.8 (± 1.78) kg.
Our results show that measurements taken at a single standard handle position are sufficiently accurate to assess grip strengths for all subjects. We therefore recommend handle position 2 as the standard position for measuring grip strength with the Jamar Plus+ hand dynamometer.
The assessment of grip strength with the Jamar Plus+ dynamometer is easier and faster if a single, standard handle position is used rather than multiple different positions. As well as providing accurate results, a single, standard handle position also reduces fatigue and increases the comparability of results between subjects.
握力是一般肌肉力量的一个指标，通过握力计进行测量。在一些研究中，受试者的握力被视为在握力计几个不同手柄位置测量所获得的最大握力。然而，关于这些不同位置对测量握力的影响知之甚少。本研究的目的是确定一个可用于评估所有受试者握力的标准手柄位置。
使用握力计（Jamar Plus+；Sammons Preston，Rolyon，Bolingbrook，伊利诺伊州）评估握力。每位参与者每只手在5个不同手柄位置各测量3次握力。每位参与者的最佳位置定义为他们达到最大握力的位置。
50名参与者的平均（±标准差）年龄为41（±13）岁。所有参与者的最大握力为43.7（±12.4）千克；男性为55.0（±10.2）千克，女性为35.4（±5.2）千克。手柄位置2是70%参与者的最佳位置。每位参与者在手柄位置2所获得的握力与在其最佳位置所获得的握力之间的平均差异为0.8（±1.78）千克。
我们的结果表明，在单一标准手柄位置进行测量足以准确评估所有受试者的握力。因此，我们推荐手柄位置2作为使用Jamar Plus+握力计测量握力的标准位置。
如果使用单一标准手柄位置而非多个不同位置，使用Jamar Plus+握力计评估握力会更简便快捷。单一标准手柄位置不仅能提供准确结果，还能减少疲劳并提高受试者之间结果的可比性。
