Background: Lower back pain (LBP) is a major cause of disability and a common musculoskeletal disorder encountered at some point in life. Dysfunction of the lumbar vertebrae has been associated with decreased flexibility of the hamstrings, which exhibited a strong positive correlation with LBP. Hamstring tension affects lumbar pelvic rhythm. We aimed to activate pelvic stability with compression by Active Therapeutic Movement (ATM), muscle energy technique (MET) was applied to increase the flexibility of the hamstring.
Objects: In this study, we aimed to investigate the effects of MET with ATM and general MET were applied to the hamstring of adults, who were in their twenties with nor without LBP, on their pelvic inclination and the length of their hamstring.
Methods: A total of 32 subjects were briefed about the purpose of this study and agreed to participate voluntarily. Before the experiment, all subjects were pre-examined, and they were divided into an LBP group and a no lower back pain group accordingly. Thereafter, all subjects participated in both in a crossover manner. After at least one week, they switched to another group and participated in the same experiment.
Results: The study results revealed that both groups demonstrated significant results in the modified active knee extension test (p < 0.01) and the sit and reach test (p < 0.01) performed to assess the hamstring flexibility; an interaction (p < 0.05) was noted. Moreover, a more significant difference was observed between the MET with ATM and the general MET. Although significant results were obtained for the pelvic inclination (p < 0.01), interaction was not noted.
Conclusion: Conclusively, in this study, when the MET with ATM was applied to the two groups, there was a significant difference compared to the general MET for hamstring flexibility, but it was confirmed that there was no significant difference for the pelvic inclination.

INTRODUCTION
MATERIALS AND METHODS
    1. 연구대상자
    2. 연구 절차
    3. 중재 방법
    4. 평가 방법
    5. 분석 방법
RESULTS
    1. 연구대상자의 일반적인 특성
    2. 두 군의 세정기간(washout) 전후에 중재 전 측정값의 차이
    3. MET-ATM군과 MET군 간에 넙다리뒤근 유연성의 변화 비교
    4. MET-ATM군과 MET군 간에 골반경사 각도의 변화 비교
DISCUSSION
CONCLUSIONS
REFERENCES

• 황리경(대전대학교 보건의료대학원 물리치료학과) | Lee-kyeong Hwang (Department of Physical Therapy, Graduate School of Health and Medicine, Daejeon University)
• 김선엽(대전대학교 보건의료과학대학 물리치료학과) | Suhn-yeop Kim (Department of Physical Therapy, College of Health and Medical Science, Daejeon University, Daejeon, Korea) Corresponding author