Comparison of Selected Lnee Kinematic Factors during Single Leg Landing after Six Weeks of Multi-Angled Isometric Exercises on Knee Joint Flexor and Extensor Muscle Groups

Document Type : Original article

Authors

1 Master of Science in sport Biomechanics, Department of Sports Biomechanics, Faculty of Sports Sciences, Shahid Bahonar University of Kerman, Kerman, Iran

2 Associate Professor of Sport Biomechanics, Department of Sports Biomechanics, Faculty of Sports Sciences, Shahid Bahonar University of Kerman, Kerman, Iran

3 Associate Professor of Sport Physiology, Department of Sports physiology, Faculty of Sports Sciences, Shahid Bahonar University of Kerman, Kerman, Iran

Abstract

Background and Aims: Single-leg landing is a common movement in many sports and is known to be an important cause of non-contact anterior cruciate ligament injury, since some well-known exercises have a beneficial effect on the non-contact injuries. The purpose of the current study was to compare male individuals' selected knee kinematic factors during single leg landing after six weeks of multi-angled isometric exercises on knee joint flexor and extensor muscle groups.
Materials and Methods: In the present study, 30 males (mean age: 24.82 ± 1.88 y, weight: 78.8 ± 1.08 kg, height: 1.87 ± 0.05 m) were objectively selected. Participants were randomly divided into two groups of isometrics (n=15) and controls (n=15). Prior to and six weeks after the exercises (3 sessions per week), at the same time and place, the single-leg landing motion was recorded by the motion analysis system, and using MATLAB software the values ​​of knee valgus, knee flexion, and tibia rotation were evaluated. During the research period, the control group did not have any therapeutic intervention program. The results of the study were analyzed using covariance analysis.
Results: The results showed that there was a significant decrease in the valgus angle after training (P=0.029), a significant increase in knee flexion angles (P=0.001), and a significant decrease in the angle of tibia rotation (P =0.000)
Conclusion: According to the results, multi-angular isometric exercises have a positive effect on the selected kinematic factors studied in the present study. These factors are important factors in the anterior cruciate ligament injury; therefore, it seems that such exercises can be carried out without the need for certain specialties. These exercises are suggested to prevent anterior cruciate ligament injury.

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References

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The Scientific Journal of Rehabilitation Medicine
Volume 8, Issue 2
July 2019
Pages 182-190

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History

  • Receive Date: 18 December 2018
  • Revise Date: 15 January 2019
  • Accept Date: 20 January 2019
  • First Publish Date: 22 June 2019

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