The passive straight leg raise (PSLR) test is widely used to assess hamstring extensibility. However, to accurately measure hamstring extensibility throughout PSLR, appropriate stabilization of the pelvis must be provided in order to minimize the possible influence of any compensatory movement in the scores reached. The main purpose of this study was to demonstrate the degree of influence of the Lumbosant© and an assistant examiner in hamstring extensibility in healthy young adults. A secondary objective was to verify the variability of the posterior pelvic tilt movement. Hamstring muscle extensibility was measured using the traditional (only an examiner) and new (using a low-back protection support Lumbosant© and two trained [principal and assistant] examiners) PSLR procedures. Correlation coefficients were expressed using r values, accompanying descriptors and 90% confidence intervals. Variance explained was expressed via the R2 statistic. To examine possible differences, the Mann-Whitney U-test was conducted. Additionally, Cohen’s d was calculated for all results, and the magnitudes of the effect were interpreted and statistical significance set at p < 0.05. A stepwise multiple regression analysis was performed to examine the relationship between scores and values. The final score that was determined with the new PSLR is significantly lower (13° approximately) than the one obtained through the traditional procedure (75.3 ± 14.4° vs. 89.2 ± 20.8°; d = −0.777 [moderate]). The data presented in this study suggest that the PSLR may overestimate hamstring extensibility unless lumbopelvic movement is controlled. Therefore, we recommend the use of Lumbosant© and an auxiliary examiner to obtain more accurate hamstring extensibility scores.

中文翻译：

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直腿抬高测试：Lumbosant© 和助理检查员对髋部、骨盆倾斜和腰椎前凸的影响

被动直腿抬高 (PSLR) 测试被广泛用于评估腘绳肌的伸展性。然而，为了准确测量整个 PSLR 中腘绳肌的伸展性，必须提供适当的骨盆稳定性，以尽量减少任何代偿性运动对达到的分数的可能影响。本研究的主要目的是证明 Lumbosant© 和助理检查员对健康年轻人腘绳肌伸展性的影响程度。次要目标是验证骨盆后倾运动的可变性。使用传统的（仅一名检查员）和新的（使用腰背保护支撑 Lumbosant© 和两名训练有素的 [主要和助理] 检查员）PSLR 程序测量腘绳肌的伸展性。相关系数用 r 值表示，伴随的描述符和 90% 置信区间。解释的方差通过 R2 统计量表示。为了检查可能的差异，进行了 Mann-Whitney U 检验。此外，计算了所有结果的 Cohen's d，并解释了效应的大小，并将统计显着性设置为 p < 0.05。进行逐步多元回归分析以检查分数和值之间的关系。使用新 PSLR 确定的最终分数明显低于通过传统程序获得的分数（约 13°）（75.3 ± 14.4° vs. 89.2 ± 20.8°；d = -0.777 [中等]）。本研究中提供的数据表明，除非腰盆运动得到控制，否则 PSLR 可能会高估腘绳肌的伸展性。所以，