Due to its applicability, variations in squat exercise have been emphasized in the fields of strength and conditioning of physical therapy. This study examines squat(Closed Kinetic Chon : CKC) variations which are highly effective and appropriate exercise in developing the lower limb leg muscles and the trunk muscles as well. However, a comparative study is insufficient of which muscle is more activated during excercising squat, between core muscles and lower limb muscles. Therefore, this study tried to identify which muscle shows more effective muscle activity through distinctive excercise of squat, by measuring and comparing muscle activities of trunk muscle and lower limb muscles during exercising.
A total of fifteen male university students who had no pain nor surgical history of the knee or hip, were selected as subjects. They were asked to perform floor squat, jummper squat, and dynairball squat 3 sets of 10 times for 4 weeks. The sequence of actions was performed randomly to exclude the effect of orders and to increase the objectivity of data. For measurements, the Inbody720 was used to measure body composition and the Noraxon sys was used to measure muscle activity.
The results of this study showed that the average muscle activity of rectus abdominis, biceps femoris, made a statistically significant difference during jummper, dynairball squats (p <.05), whereas the average muscle activity of soleus muscle indicated a statistically significant difference during jummper, dynairball squats (p<.001).
Over all, this study contributes to the field of strength and conditioning of physical therapy by examining how different squat exercise affects different muscle development. This study also provides insights into exercise program developments on how effectively strengthen the low limb muscles.