Martins Jaqueline, da Silva Janaina Rodrigues, da Silva Marcelo Rodrigues Barbosa, Bevilaqua-Grossi Débora
Ribeirão Preto Medical School, University of São Paulo, Brazil.
J Athl Train. 2017 Sep;52(9):809-819. doi: 10.4085/1062-6050-52.6.04. Epub 2017 Aug 8.
The belt-stabilized handheld dynamometer (HHD) has been used to assess the strength of knee- and hip-muscle groups. However, few researchers have examined its reliability and validity for assessing the strength of these muscles.
To evaluate the intra-examiner reliability of the belt-stabilized HHD and its validity and agreement with the isokinetic dynamometer for assessing the strength of knee- and hip-muscle groups.
Cross-sectional study.
University laboratory.
We evaluated 26 healthy participants (13 men, 13 women; age = 23.5 ± 2.8 years, height = 1.7 ± 0.1 m, mass = 68.6 ± 12.4 kg) in 2 sessions using the belt-stabilized HHD and an isokinetic dynamometer for maximum strength of the hip adductors, abductors, flexors, extensors, internal rotators, and external rotators and the knee flexors and extensors.
MAIN OUTCOME MEASURE(S): We used reliability values provided by the intraclass correlation coefficient (2,3), standard error of measurement (SEM and percentage SEM), and minimal detectable change; correlation values comparing the belt-stabilized HHD and the isokinetic instrument using the Pearson correlation coefficient (r); and the mean difference in values comparing the 2 instruments using the Bland-Altman method.
The intrarater HHD reliability was excellent for most measurements (range = 0.80-0.96; SEM = 1.3-5.3 kilograms of force or 4.8-18.9 Nm, percentage SEM = 7.0%-22.0%, minimal detectable change = 3.6-18.8 kilograms of force or 13.2-52.4 Nm) and was moderate only for bilateral knee flexion and left hip internal rotation (intraclass correlation coefficient [2,3] = 0.62-0.66 and 0.70, respectively). Correlation with the isokinetic dynamometer was moderate to high (r = 0.60-0.90), but the absolute values did not demonstrate concordance between results using the Bland-Altman method.
The belt-stabilized HHD measurements were reliable, and although they did not agree with those from the isokinetic dynamometer, the values were correlated for the hip- and knee-muscle groups.
带式稳定手持式测力计（HHD）已被用于评估膝关节和髋关节肌肉群的力量。然而，很少有研究人员检验其在评估这些肌肉力量方面的可靠性和有效性。
评估带式稳定HHD在评估膝关节和髋关节肌肉群力量时的检查者内可靠性、有效性以及与等速测力计的一致性。
横断面研究。
大学实验室。
我们对26名健康参与者（13名男性，13名女性；年龄=23.5±2.8岁，身高=1.7±0.1米，体重=68.6±12.4千克）进行了两次评估，使用带式稳定HHD和等速测力计测量髋关节内收肌、外展肌、屈肌、伸肌、内旋肌、外旋肌以及膝关节屈肌和伸肌的最大力量。
我们使用组内相关系数（2,3）、测量标准误差（SEM和SEM百分比）以及最小可检测变化提供的可靠性值；使用Pearson相关系数（r）比较带式稳定HHD和等速仪器的相关值；以及使用Bland-Altman方法比较两种仪器测量值的平均差异。
对于大多数测量，检查者内HHD的可靠性极佳（范围=0.80 - 0.96；SEM = 1.3 - 5.3千克力或4.8 - 18.9牛米，SEM百分比 = 7.0% - 22.0%，最小可检测变化 = 3.6 - 18.8千克力或13.2 - 52.4牛米），仅双侧膝关节屈曲和左侧髋关节内旋的可靠性为中等（组内相关系数[2,3]分别为0.62 - 0.66和0.70）。与等速测力计的相关性为中等至高（r = 0.60 - 0.90），但使用Bland-Altman方法时，结果的绝对值未显示出一致性。
带式稳定HHD测量结果可靠，尽管与等速测力计的测量结果不一致，但对于髋关节和膝关节肌肉群，两者测量值具有相关性。
