Erasmus Medical Center, Department of Orthopaedics, Room Hs-104, PO Box 2040, 3000 CA Rotterdam, The Netherlands.
Am J Sports Med. 2013 Aug;41(8):1757-61. doi: 10.1177/0363546513490650. Epub 2013 Jun 4.
Hamstring flexibility measurements are of clinical relevance for the prognosis of hamstring injury and for monitoring recovery after such injury. The active knee extension test (AKET) and passive knee extension test (PKET) are proven to be reliable in healthy subjects. Reliability has not been determined in patients with acute hamstring injuries.
The purpose of this study was to determine intertester reliability of the AKET and the PKET in patients with acute hamstring injuries.
Cohort study (diagnosis); Level of evidence, 2.
Fifty consecutive athletes with acute hamstring injuries confirmed with magnetic resonance imaging were included in this study. For each subject, 2 testers performed the AKET and the PKET within 5 days after injury. Intraclass correlation coefficient (ICC), standard error of measurement (SEM), and minimal detectable difference (MDD) were determined.
In the injured leg, the ICC of the AKET was 0.89 and of the PKET 0.77, the SEM of the AKET was 5.3° and of the PKET 7.6°, and the MDD of the AKET of the 15° and of the PKET 21°.
Good intertester reliability was found for the AKET and the PKET in injured hamstrings. Thus, both tests can be reliably used to assess flexibility in injured hamstrings, despite pain and discomfort during testing.
腘绳肌柔韧性测量对预测腘绳肌损伤的预后和监测损伤后的恢复情况具有临床意义。主动膝关节伸展试验（AKET）和被动膝关节伸展试验（PKET）在健康受试者中已被证明具有可靠性。在急性腘绳肌损伤患者中，其可靠性尚未确定。
本研究旨在确定急性腘绳肌损伤患者 AKET 和 PKET 的测试者间可靠性。
队列研究（诊断）；证据水平，2 级。
本研究纳入了 50 例经磁共振成像证实的急性腘绳肌损伤的运动员。对于每个受试者，2 名测试者在损伤后 5 天内进行 AKET 和 PKET。测定组内相关系数（ICC）、测量标准误差（SEM）和最小可检测差异（MDD）。
在受伤腿中，AKET 的 ICC 为 0.89，PKET 的 ICC 为 0.77，AKET 的 SEM 为 5.3°，PKET 的 SEM 为 7.6°，AKET 的 MDD 为 15°，PKET 的 MDD 为 21°。
在受伤的腘绳肌中，AKET 和 PKET 具有良好的测试者间可靠性。因此，尽管在测试过程中会出现疼痛和不适，但这两种测试都可以可靠地用于评估受伤腘绳肌的柔韧性。
