Journal of Korean Physical Therapy Science (대한물리치료과학회지)

Korean Physical Therapy Science (대한물리치료과학회)
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Influence of successive active knee extension tests on hamstring flexibility

연속적 능동무릎폄 검사가 뒤넙다리근의 유연성에 미치는 영향

  • 임우택 (우송대학교 물리치료학과)
  • Received : 2021.02.10
  • Accepted : 2021.04.07
  • Published : 2021.06.30
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Abstract

Background: In clinical practice, active knee extension (AKE) test has been widely used to measure hamstring flexibility. During the AKE test, the knee extension is repeated six times. The first five repetitions are considered as warm-up, and the sixth is used as baseline. In order to accurately measure the subject's inherent flexibility, warm-up trials have been proposed as mentioned above; but currently, the evidence is insufficient. Design: Cross-sectional study. Methods: Forty-three healthy adults participated in this study. The AKE was performed slowly after flexing the hip and knee joints by 90° in a supine position. The knee was extended as far as could be done without causing discomfort or pain. When reaching the end range, knee flexion was performed without stopping. As per standard protocol, the subjects performed the knee extension six times. Results: There was no significant difference between the AKE value in the first trial with those in the other five trials. During the repetitions, the average value in the group with higher flexibility tended to decrease and the Intraclass correlation coefficient gradually decreased. Conclusion: Successive repetitions of the AKE test can misrepresent an individual's inherent hamstring flexibility. In order to avoid a decrease in hamstring flexibility, it is strongly recommended that individuals with high initial hamstring flexibility avoid unnecessary repetitions of the AKE test.

Keywords

Acknowledgement

이 논문은 2020년도 우송대학교 교내학술연구조성비 지원으로 쓰인 것임.

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