Background: A limited hip rotational range of motion (ROM) has been considered to be one of characteristics of low back pain (LBP) in athletes. Although LBP frequently occurs in jiu-jitsu athletes, no previous has compared hip rotational ROM between jiu-jitsu athletes with and without LBP.
Objects: The aim of the study was to compare ROM for hip internal rotation (IR) and external rotation (ER), and total hip rotation between jiu-jitsu athletes with and without LBP.
Methods: Jiu-jitsu athletes were recruited for the LBP group (n1=15) and control group without LBP (n2=15). IR, ER, and total rotational range of hip joint were measured using a goniometer. Analysis of variance was used to compare the ROM between groups and sides.
Results: The LBP group showed a significantly lower range of passive hip IR, passive total rotation, active IR, active ER, and active total rotation than the control group (p<.05). Dominant side of passive hip IR and active IR had a significantly lower ROM than non-dominant side (p<.05). In passive ER ROM, non-dominant side was significantly greater than dominant side (p<.05).
Conclusion: Compared to jiu-jitsu athletes without LBP, athletes with LBP exhibit a loss of hip rotational ROM. Based on these results, clinicians and athletic trainers should measure hip rotational ROM when designing the management plan for jiu-jitsu athletes with LBP.

Abstract
 Ⅰ. 서론
 Ⅱ. 연구방법
  1. 연구대상자
  2. 실험기기 및 도구
  3. 실험방법
 Ⅲ. 결과
 Ⅳ. 고찰
 Ⅴ. 결론
 References

• 양성준(전주대학교 일반대학원 재활과학과, Dept. of Rehabilitation, The Graduate School, Jeonju University) | Sung-jun Yang
• 박규남(전주대학교 의과학대학 물리치료학과, Dept. of Physical Therapy, College of Medical Science, Jeonju University) | Kyue-nam Park Corresponding Author
• 경문수(전주대학교 문화관광대학 패션산업학과, Dept. of Fashion Business, College of Culture and Tourism, Jeonju University) | Moon-soo Kyung
• 김시현(연세대학교 보건과학대학 물리치료학과, Dept. of Physical Therapy, College of Health Science, Yonsei University) | Si-hyun Kim