Aspetar Orthopaedic and Sports Medicine Hospital, Qatar.
J Sci Med Sport. 2012 Sep;15(5):444-50. doi: 10.1016/j.jsams.2012.01.003. Epub 2012 Mar 15.
Describe inter-rater reliability of, and correlations between a novel method of isometric knee extension and flexion and eccentric knee flexion strength using hand-held dynamometry and isokinetic testing for flexion/extension in the knees of athletic participants. Document strength data normalized to the individual's limb muscle mass.
Observational and reliability study.
Inter-rater reliability for each of the hand-held dynamometry measures was established in both legs of 10 volunteers (6 male). During routine annual screening, 216 male professional football (soccer) players were examined using these same measures in addition to performing an isokinetic evaluation of knee flexion and extension strength. Intra-class correlation coefficients for inter-rater reliability, Pearson r correlations between hand-held dynamometry and isokinetic dynamometry were calculated. Peak torque, peak torque normalized to: body weight; lean body mass; and lean limb mass were documented.
Excellent inter-rater reliability was demonstrated with intra-class correlation₂,₁ values of 0.90, 0.91, and 0.96, for the eccentric hamstrings, isometric hamstrings, and isometric quadriceps measures respectively. Medium to high correlations (r=0.322-0.617) which were all significant (p<0.001) were found for the comparisons between the hand-held dynamometry and isokinetic measures.
We present 3 novel and reliable methods of examining knee flexion and extension strength using hand-held dynamometry which require less skill and strength on the part of the examiner than previous measures. Correlations between these measures and isokinetic dynamometry are documented. The hand-held dynamometry examinations took less than 4 min per player to conduct and may be useful in clinical practice where isokinetic examination can be difficult to implement.
描述一种新的等长膝关节伸展和屈曲测量方法与手持测力计和等速测试的离心性膝关节屈曲强度之间的的评估者间信度以及相关性，方法适用于运动员膝关节。记录力量数据并进行个体肢体肌肉质量的标准化。
观察性和可靠性研究。
10 名志愿者（6 名男性）的每条腿的手持测力计测量的评估者间信度均已建立。在常规年度筛查期间，除了对膝关节屈曲和伸展强度进行等速评估外，还使用相同的测量方法对 216 名男性职业足球（足球）运动员进行了检查。计算了评估者间信度的组内相关系数 ₂,₁、手持测力计和等速测力计之间的 Pearson r 相关性。记录峰值扭矩、体重归一化峰值扭矩、瘦体重归一化峰值扭矩和瘦肢体质量归一化峰值扭矩。
表现出极好的评估者间信度，离心性腘绳肌、等长腘绳肌和等长股四头肌测量的组内相关系数₂,₁值分别为 0.90、0.91 和 0.96。手持测力计和等速测量之间的比较发现了中等至高相关性（r=0.322-0.617），且均具有统计学意义（p<0.001）。
我们提出了 3 种新颖且可靠的使用手持测力计检查膝关节伸展和屈曲强度的方法，这些方法比以前的测量方法需要更少的评估者技能和力量。记录了这些测量方法与等速测力计之间的相关性。每个运动员的手持测力计检查耗时不到 4 分钟，在等速检查难以实施的临床实践中可能很有用。
