| dc.description.abstract | Background: Investigating the antagonists knee muscle activity during open and closed kinetic chain exercises and among gender is not only important to understand knee mechanics among healthy but also its importance in designing effective exercises for sports, post injury and post-surgical rehabilitation of the knee.
Aim: The aim of this study was to investigate the antagonist activity during different open kinetic chain and closed kinetic chain exercises and compare the differences between males and females.
Study Design: Cross sectional study
Methods: 18 healthy and active participants, males (n=9, mean ± SD; age 25.4±2.24 years, height 183.2±7.02 cm, and weight 79.5±8.68 kg) and females (n=9, mean ± SD; age 24.4±2 years, height 167.2±10.9 cm and weight 65.4±10.2 kg) who are involved in regular sports were recruited in the study. Each participant performed seated single leg extension, standing single leg flexion and bilateral knee squat in a movement lab. EMG data obtained were analyzed using MATLAB and repeated measure of analysis of variance to compare antagonist activity ratio across all exercises and groups.
Results: No significant differences were found for antagonist ratio among different gender across all exercises (F3,32=1.372, p=0.269, ɳ2=0.114). The result of analysis of variance between group effect indicated a significant exercises effect, Wilks’s Lambda= 0.065, F (6,12) = 28.804, p <0.001, ɳ2=0.94. follow up pairwise comparison was significant, p<0.007.
Conclusion: The result of this study confirmed our hypothesis that the antagonist activity is different across different open and closed kinetic chain exercises. However, the magnitude of differences among gender is not significant. This knowledge can be used to design both open and closed kinetic exercises among healthy and knee injured individuals. | |
