Functional Asymmetry of Lower Limbs in Female Elite Volleyball Players during Jumping - landing

Author: Doroudian Zohreh* and Jamshidi Ali Ashraf**

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Abstract

Introduction: kinetic symmetry of joints is effective in quality of implementing sport techniques and injury prevention. This issue is more important in lower limbs. The present study aimed to investigate symmetry in biomechanical and kinetic variables in lower limbs of elite female volleyball players during jumping - landing. The statistical population consisted of 12 female elite volleyball players of Iranian national team. Ankle, knee and thigh joint torques were measured using movement analysis system (camera and force plates) and calculated using inverse dynamics method. For this purpose, movement analysis system data and force plate data were integrated with anthropometric data and joint torques were estimated using a biomechanical model. The two legs were compared using paired t-test. Asymmetry was calculated using the following formula: the difference between superior leg and inferior leg divided by superior leg multiplied by 100. Maximum values of kinetic parameters (ankle, kn

Keywords

kinetic symmetry, jumping-landing, lower limbs, volleyball

Conclusion

The graphs of minimum and maximum difference in torques between superior and inferior organs in ankle, knee and thigh joints in eccentric and concentric phases and initial contact with the ground and force absorption. Maximum values of kinetic parameters (ankle, knee and thigh torques) represent functional asymmetry of lower limbs of elite female volleyball players during jumping-landing. However, this issue in minimum values shows functional asymmetry of lower limbs in volleyball players mostly in middle phases. According to the study and the information obtained from bodybuilding coach and laboratory results, asymmetry in torques were due to following reasons: Players of women's Iranian national volleyball team were not at peak of general physical fitness. Thus, professional bodybuilding could not be performed for symmetry in leg muscular strength. Bodybuilding techniques were performed for both legs simultaneously. However, bodybuilding techniques should be singularly performed for

References

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How to cite this article

Doroudian Zohreh* and Jamshidi Ali Ashraf (2016). Functional Asymmetry of Lower Limbs in Female Elite Volleyball Players during Jumping - landing , Biological Forum – An International Journal 8(1): 113-117.