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Change in Gastrocnemius Pennation Angle According to Ankle Dorsiflexion among University Students

일부 대학생의 발목관절 발등굽힘 각도 변화에 따른 장딴지근 깃각의 차이

  • Kim, Ji-Seon (Department of Physical Therapy, College of Health, Kyungwoon University) ;
  • Seo, Byoung-Do (Department of Physical Therapy, College of Health, Kyungwoon University) ;
  • Shin, Hyung-Soo (Department of Physical Therapy, College of Health, Kyungwoon University) ;
  • Shin, Hee-Joon (Department of Physical Therapy, College of Health, Kyungwoon University) ;
  • Ju, Joung-Youl (Department of Physical Therapy, College of Health, Kyungwoon University)
  • 김지선 (경운대학교 보건대학 물리치료학과) ;
  • 서병도 (경운대학교 보건대학 물리치료학과) ;
  • 신형수 (경운대학교 보건대학 물리치료학과) ;
  • 신희준 (경운대학교 보건대학 물리치료학과) ;
  • 주정열 (경운대학교 보건대학 물리치료학과)
  • Received : 2015.10.22
  • Accepted : 2015.12.04
  • Published : 2015.12.31
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Abstract

This study aimed to investigate the influence of the ankle dorsiflexion angle ($0^{\circ}$, $10^{\circ}$, and $20^{\circ}$) on the effectiveness of gastrocnemius stretching angle. The subjects of this study were 25 young man and female women. In all participants, the pennation angle of the medial head of the gastrocnemius was evaluated using ultrasonography at an ankle dorsiflexion angle of $0^{\circ}$, $10^{\circ}$, or $20^{\circ}$. Repeated measures analysis of variance was uesd to test for differences between ankle dorsiflexion angles. The independent t-test was performed to determine the significance of sex differences. The results of this study showed that the gastrocnemius pennation angle decreased as the ankle dorsiflexion angle increased, with significant interaction between each angle of ankle dorsiflexion angle (p<0.01). Sex comparison showed that the pennation angle was greater in man than in women, but the difference was not significant (p>0.05). According to the sex the gastrocnemius pennation angle is decreased as the ankle dorsiflexion angle increased (p<0.01). These results suggest that the end range of dorsiflexion is more beneficial for gastrocnemius stretching than a small range. Further studies are needed to investigate the influence of other factors, such as stretching angle and application time, on gastrocnemius stretching.

본 연구의 목적은 발목관절의 발등굽힘 각도를 $0^{\circ}$, $10^{\circ}$, $20^{\circ}$로 위치하게 한 후 각 각도에서 장딴지근의 깃각 변화에 미치는 영향을 비교하여 효율적인 장딴지근 신장 각도를 제시하는 것이다. 건강한 성인 남녀 25명을 그 대상으로 하여 발목관절 발등굽힘 각도 $0^{\circ}$, $10^{\circ}$, $20^{\circ}$에서 초음파 기기를 이용하여 내측 장딴지근의 깃각을 측정하였다. 각도별 장딴지근의 깃각 변화를 알아보기 위해 반복측정분산분석을 성별에 따른 각도별 차이를 알아보기 위해 독립 t 검정을 실시하였다. 연구의 결과 발목관절의 발등굽힘 각도가 증가함에 따라 장딴지근의 깃각은 유의하게 감소하였으며, 각 각도별 사이 교호작용이 유의한 것으로 나타났다(p<.01). 각 각도별 남녀 차이 비교 결과 남성의 깃각이 더 큰 값을 보였으나 유의한 차이는 없었으며(p.>.05), 성별에 따른 발등굽힘 각도 증가에 따른 장딴지근의 깃각은 유의한 차이를 보였다(p<.01). 이러한 결과는 장딴지근 신장을 위한 발등굽힘 시 관절운동범위의 마지막 범위에서 시행하는 것이 장딴지근의 신장에 작은 각도로 시행하는 것보다 긍정적인 효과를 가져올 수 있다는 것을 의미한다. 향후 장딴지근 신장에 영향을 미치는 신장 각도, 적용 시간 등 다양한 요소들에 대한 연구가 지속되어야 할 것이다.

Keywords

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