Activity of Knee Flexors and Extensors on Change of Ankle Joint Position

발목관절 자세 변화에 대한 무릎관절 굽힘근과 폄근의 활성도

  • Kwon, Yu-Jeong (Dept. of Physical Therapy, Catholic University of Pusan) ;
  • Lee, Hyun-Ok (Dept. of Physical Therapy, Gradurate School, Catholic University of Pusan)
  • 권유정 (부산가톨릭대학교 대학원 물리치료과) ;
  • 이현옥 (부산가톨릭대학교 물리치료과)
  • Received : 2013.11.29
  • Accepted : 2013.12.16
  • Published : 2013.12.31


Purpose : The purpose of this study was to examine the activity of the knee flexor and extensor with ankle plantar flexion and dorsiflexion. Methods : A total of 18 subjects(Male 6, female 12) performed 4 lower extremity patterns of PNF and the activities of the vastus medialis oblique, rectus femoris, vastus lateralis, biceps femoris, semitendinosus ipsilateral sides were measured using electromyography. Results : During 4 lower extremity patterns of PNF, knee flexor and extensor muscle activity were significantly difference. Knee extensors were shown to be higher knee extension and ankle dorsiflexion combined pattern. Knee flexors were shown to be higher knee flexion and ankle plantarflexion combined pattern. Conclusion : We suggest that it is efficient to strengthening of knee extensors with ankle dorsiflexion and to strengthening of knee flexors with ankle plantar flexion. Also, for the functioning as toe standing, we have to choice appropriate movement pattern.