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http://dx.doi.org/10.13066/kspm.2012.7.2.173

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

Kwon, Yoo-Jung (Major in Physical Therapy, Department of Rehabilitation Science, Graduate school, Daegu University)
Park, Soo-Jin (Department of Physical Therapy, Sunlin University)
Kim, Kyoung (Department of Physical Therapy, College of Rehabilitation Science, Daegu University)
Publication Information
Journal of the Korean Society of Physical Medicine / v.7, no.2, 2012 , pp. 173-182 More about this Journal
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.
Keywords
Open kinetic chain exercise; Closed kinetic chain exercise; muscle activity;
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