Kazman Josh B, Galecki Jeffrey M, Lisman Peter, Deuster Patricia A, OʼConnor Francis G
Department of Military and Emergency Medicine, Uniformed Services University, Bethesda, Maryland.
J Strength Cond Res. 2014 Mar;28(3):672-8. doi: 10.1519/JSC.0b013e3182a6dd83.
Functional movement screening (FMS) is a musculoskeletal assessment that is intended to fill a gap between preparticipation examinations and performance tests. Functional movement screening consists of 7 standardized movements involving multiple muscle groups that are rated 0-3 during performance; scores are combined into a final score, which is intended to predict injury risk. This use of a sum-score in this manner assumes that the items are unidimensional and scores are internally consistent, which are measures of internal reliability. Despite research into the FMS' predictive value and interrater reliability, research has not assessed its psychometric properties. The present study is a standard psychometric analysis of the FMS and is the first to assess the internal consistency and factor structure of the FMS, using Cronbach's alpha and exploratory factor analysis (EFA). Using a cohort of 877 male and 57 female Marine officer candidates who performed the FMS, EFA of polychoric correlations with varimax rotation was conducted to explore the structure of the FMS. Tests were repeated on the original scores, which integrated feelings of pain during movement (0-3), and then on scores discounting the pain instruction and based only on the performance (1-3), to determine whether pain ratings affected the factor structure. The average FMS score was 16.7 ± 1.8. Cronbach's alpha was 0.39. Exploratory factor analysis availed 2 components accounting for 21 and 17% and consisting of separate individual movements (shoulder mobility and deep squat, respectively). Analysis on scores discounting pain showed similar results. The factor structures were not interpretable, and the low Cronbach's alpha suggests a lack of internal consistency in FMS sum scores. Results do not offer support for validity of the FMS sum score as a unidimensional construct. In the absence of additional psychometric research, caution is warranted when using the FMS sum score.
功能性动作筛查（FMS）是一种肌肉骨骼评估方法，旨在填补参与前检查和性能测试之间的空白。功能性动作筛查由7个标准化动作组成，涉及多个肌肉群，在执行过程中评分为0 - 3分；分数合并为最终得分，旨在预测受伤风险。以这种方式使用总分假设这些项目是单维的且分数具有内部一致性，这是内部信度的度量。尽管对FMS的预测价值和评分者间信度进行了研究，但尚未评估其心理测量特性。本研究是对FMS的标准心理测量分析，并且是首次使用克朗巴哈系数和探索性因素分析（EFA）来评估FMS的内部一致性和因素结构。对877名男性和57名女性海军陆战队军官候选人进行了FMS测试，通过对具有方差最大化旋转的多系列相关进行EFA来探索FMS的结构。对原始分数（综合运动时的疼痛感受，0 - 3分）进行重复测试，然后对不考虑疼痛指示仅基于表现（1 - 3分）的分数进行重复测试，以确定疼痛评分是否影响因素结构。FMS平均得分为16.7±1.8。克朗巴哈系数为0.39。探索性因素分析得到两个成分，分别占21%和17%，由单独的个体动作组成（分别为肩部活动度和深蹲深度）。对不考虑疼痛的分数进行分析得到了类似结果。因素结构无法解释，低克朗巴哈系数表明FMS总分缺乏内部一致性。结果不支持FMS总分作为单维结构的有效性。在没有额外心理测量研究的情况下，使用FMS总分时应谨慎。
