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Original Article

젊은 여성의 한쪽 다리 스텝다운 동작 시 슬관절 외반 정도와 대퇴사두근 근활성도 간의 상관관계

원문정보

The Relationships Between Valgus Collapse Knee Position and Quadriceps Activity During a Single Limb Step Down in Female Subjects

이세희, 문영, 송지현, 김선엽, 장현정

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초록

영어

Background: This study was designed to investigate the correlation between electromyography (EMG) activities in the vastus medialis oblique (VMO) vs vastus lateralis (VL) activity ratio and the valgus collapse knee position while stepping down. Methods: Twenty healthy women volunteered to participate in this study. We measured the frontal-plane projections of the knee valgus angle, knee valgus distance, and hip adduction angle by using a digital camcorder. After 3 repetitions of the step down (dominant side) exercise, the findings of the static and dynamic phases were analyzed. EMG activities data of the VMO:VL activity ratio were recorded during the step down exercise and were normalized to the maximal voluntary isometric contraction (MVIC) of the quadriceps. A paired t-test was used to compare the findings of the static and dynamic phases. We analyzed the Spearman’s rank order correlation coefficient between the and VMO:VL ratio. Results: Hip adduction angle, knee valgus angle, VMO activity, VL activity, VMO:VL activity ratio were statistically higher in the dynamic phase than in the static phase (p<.05). Frontal-plane projections of knee valgus angle were significantly correlated with hip adduction angle (r=.459, p<.05) and knee valgus distance (r=.505, p<.05). However, the EMG activity ratio of the VMO and the VL did not show a significant change during step down exercise with respect to hip adduction angle (p=.875), knee valgus angle (p=.618), and knee valgus distance (p=.701). Conclusion: The results from this study indicate that frontal-plane projections of knee valgus angle were associated with hip adduction angle and knee valgus distance. On the basis of these results, the knee valgus distance may be used to determine the valgus collapse knee position while stepping down.

목차

ABSTRACT
 I. 서론
 II. 연구방법
  1. 연구대상자
  2. 측정방법 및 측정도구
  3. 실험방법
  4. 분석방법
 III. 결과
  1. 연구대상자의 일반적 특성
  2. 스텝다운 동작 시 슬관절 외반슬 정도와 대퇴사두근의 근활성도
  3. 스텝다운 동작 시 슬관절 외반슬 정도와 대퇴사두근 근활성도 간의 상관관계
 V. 결론
 참고문헌

저자정보

  • 이세희 Se-hee Lee. 대전대학교 자연과학대학 물리치료학과
  • 문영 Young Moon. 대전대학교 자연과학대학 물리치료학과
  • 송지현 Ji-hyun Song. 대전대학교 자연과학대학 물리치료학과
  • 김선엽 Suhn-yeop Kim. 대전대학교 자연과학대학 물리치료학과
  • 장현정 Hyun-jeong Jang. 대전대학교 대학원 물리치료학과

참고문헌

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