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The Effect of Open and Closed Chain Exercise on Lower Extremity Muscle Activity in Adults

  • Journal of the Korean Society of Physical Medicine
  • Abbr : J Korean Soc Phys Med
  • 2012, 7(2), pp.173-182
  • Publisher : The Korean Society of Physical Medicine
  • Research Area : Medicine and Pharmacy > Physical Therapy > Other physical therapy

권유정 1,  박수진 2,  Kyoung Kim ORD ID 1

1대구대학교
2선린대학교

Candidate

ABSTRACT

Purpose：This study was investigated the effect of lower extremity muscle activity during open kinetic chain exercise (OKC) and closed kinetic exercise (CKC) in normal young adults. Methods：The participants were consisted of forty-one. All subjects were randomly assigned to two groups of open kinetic chain exercise group (n=21) and closed kinetic chain exercise group(n=20). It was perform 3 sets, 3 times per week for 6 weeks both open kinetic chain exercise group and closed kinetic chain exercise group. Subjects were assessed for each subject took pre-test, post-test in 2 weeks, post-test in 4 weeks, post-test in 6 weeks measurement the surface EMG data for vastus medialis and lateralis, lateral and medial hamstring, lateral and medial gastrocnemius, tibialis anterior. Results：The vastus medialis and lateralis muscle activity was significantly increased within the intervention period both group(p<.05). The lateral and medial part of hamstring muscle activity was significantly increased with in the intervention period(p<.05). The tibialis anterior muscle activity of open kinetic chain exercise group and closed kinetic chain exercise group was significantly increased in the intervention period(p<.05). The lateral and medial part of gastrocnemius muscle activity of open kinetic chain exercise group and closed kinetic chain exercise group was significantly increased with in the intervention period(p<.05). Conclusion：It was found that both open kinetic chain exercise and closed kinetic chain exercise was significantly increased muscle activity. Further studies are needed to analyzed long term effects and subjects resulting from these changed. these exercises can be selectively adapted not only as treatment exercise for patients but also as preventive exercise for normal person to improve balancing ability by conducting proper amount of exercise for each individual’s condition and stage.

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