Effect of Quadriceps Muscular Fatigue on Knee Joint Kinetics at Different Flexion/Extension Velocities in Male Soccer Players

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Abdollahpour Darvishani Mohammad; Barghamadi Mohsen; Jafarnezhadgero Amir Ali

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Journal: SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE Year:2019 | Volume:8 | Issue:2 Page(s): 86-96

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Title

Effect of Quadriceps Muscular Fatigue on Knee Joint Kinetics at Different Flexion/Extension Velocities in Male Soccer Players

Author(s)

Abdollahpour Darvishani Mohammad | Barghamadi Mohsen | Jafarnezhadgero Amir Ali | Issue Writer Certificate

Keywords

KineticsQ1

Knee kinematicsQ1

Local fatigueQ1

Quadriceps MusclesQ1

Abstract

Background and Aims: The purpose of the current study was to investigate the effect of quadriceps muscular fatigue on knee joint Kinetics and kinematics in professional soccer players. Materials and Methods: In the present semi-experimental study, 20 male soccer players (age: 22. 902. 29 years) volunteered to participate. Isokinetic dynamometer (Gymnex ISO 2) was used to measure biomechanical variables during 60, 180, and 360 degree/s angular velocities, each including three repetitions of different flexion/extension velocities. Shapiro-Wilks goodness-of-fit test was used for normality and paired samples t-Test and Two-Way analysis of Variance were used for data analysis (p<0/05). Results: The results showed that there was a significant reduction in the peak extensor power in angular velocity of 60 degrees/s after fatigue as compared to before fatigue (p=0. 002). Also, there was significant effects of velocity factor on peak extensor torque (P<0. 001), peak flexor torque (P<0. 001), peak extensor ratio torque (P<0. 001), peak flexor ratio torque (P<0. 001), peak extensor angle torque (P=0. 048), peak extensor power (P=0. 001), peak flexor power (P=0. 003), peak extensor work (P<0. 001), peak flexor work (P<0. 001), total extensor work (P<0. 001), total flexor work (P<0. 001), and ratio Flexor strength to Extensor (P<0. 001). Conclusions: Our results demonstrated that peak extensor power in 60 degrees/s reduced after fatigue. Reduction of peak extensor power could be a possible reason of reduction of performance in the final parts of the competition.

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APA: Copy

Abdollahpour Darvishani, Mohammad, Barghamadi, Mohsen, & Jafarnezhadgero, Amir Ali. (2019). Effect of Quadriceps Muscular Fatigue on Knee Joint Kinetics at Different Flexion/Extension Velocities in Male Soccer Players. SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE, 8(2 ), 86-96. SID. https://sid.ir/paper/239407/en

Vancouver: Copy

Abdollahpour Darvishani Mohammad, Barghamadi Mohsen, Jafarnezhadgero Amir Ali. Effect of Quadriceps Muscular Fatigue on Knee Joint Kinetics at Different Flexion/Extension Velocities in Male Soccer Players. SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE[Internet]. 2019;8(2 ):86-96. Available from: https://sid.ir/paper/239407/en

IEEE: Copy

Mohammad Abdollahpour Darvishani, Mohsen Barghamadi, and Amir Ali Jafarnezhadgero, “Effect of Quadriceps Muscular Fatigue on Knee Joint Kinetics at Different Flexion/Extension Velocities in Male Soccer Players,” SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE, vol. 8, no. 2 , pp. 86–96, 2019, [Online]. Available: https://sid.ir/paper/239407/en

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