Comparison of kinematic and kinetic parameters in the lower limb during a single-leg drop vertical jump in healthy soccer players and those with anterior cruciate ligament reconstruction (ACLR)
Oral Presentation
Paper ID : 1580-SSRC
Authors
1Department of Biomechanics and Sports Injuries, Faculty of Physical Education and Sports Sciences, Kharazmi University, Tehran
2Department of Biomechanics and Sports Injuries, Faculty of Physical Education and Sports Sciences, Kharazmi University, Tehran, Iran
3Physical education and sport sciences faculty, Kharazmi University
4Faculty of Physical Education and Sports Sciences, Kharazmi University, Tehran, Iran
Abstract
Background:
Due to the prolonged healing process following anterior cruciate ligament (ACL) damage, the potential for secondary issues post-surgery, and individuals' non-compliance with rehabilitation programs, there is an elevated risk of ligament re-rupture during specialized activities such as various sports maneuvers, jumping, and landing.
Aim:
This study investigates the kinematic and kinetic variables of the lower limb during a single-leg drop vertical jump (SDVJ) after ACL reconstruction (ACLR).
Methods:
Fifteen healthy male soccer players and fifteen individuals with ACLR, each with a minimum of three years of sports experience, voluntarily participated. Kinematic and kinetic data were collected using a Vicon 8-camera 3-dimensional motion analysis system at 200 Hz, synchronized with a Kistler force platform sampling at 1000 Hz. Data were filtered using a fourth-order zero-lag Butterworth filter at 15 Hz. Marker trajectories were processed using Nexus software, and Visual 3D and MATLAB software were employed for variable calculation and analysis. The Shapiro-Wilk test assessed data normality, and the independent t-test evaluated significant differences between groups.
Results:
Findings revealed that peak knee valgus at initial contact (IC) during SDVJ was significantly higher in the ACLR group compared to the healthy group (P=0.01). However, no significant differences were observed in peak knee flexion (P=0.7). Additionally, peak ground reaction force (vGRF) and rate of loading (ROL) at IC significantly increased in the ACLR group compared to the healthy group (P=0.002, P=0.001).
Conclusion:
Considering the altered kinematics of the knee joint in the ACLR group and the increased risk of re-injury, post-surgery exercises and rehabilitation should focus on modifying athletes' techniques. The elevated vGRF in the ACLR group corresponds to an increased ROL, indicating a stiff system during skill performance and a heightened risk of ACL re-rupture. Therefore, athletes should receive feedback from sports coaches to control and adjust ROL while enhancing overall sports performance.
Due to the prolonged healing process following anterior cruciate ligament (ACL) damage, the potential for secondary issues post-surgery, and individuals' non-compliance with rehabilitation programs, there is an elevated risk of ligament re-rupture during specialized activities such as various sports maneuvers, jumping, and landing.
Aim:
This study investigates the kinematic and kinetic variables of the lower limb during a single-leg drop vertical jump (SDVJ) after ACL reconstruction (ACLR).
Methods:
Fifteen healthy male soccer players and fifteen individuals with ACLR, each with a minimum of three years of sports experience, voluntarily participated. Kinematic and kinetic data were collected using a Vicon 8-camera 3-dimensional motion analysis system at 200 Hz, synchronized with a Kistler force platform sampling at 1000 Hz. Data were filtered using a fourth-order zero-lag Butterworth filter at 15 Hz. Marker trajectories were processed using Nexus software, and Visual 3D and MATLAB software were employed for variable calculation and analysis. The Shapiro-Wilk test assessed data normality, and the independent t-test evaluated significant differences between groups.
Results:
Findings revealed that peak knee valgus at initial contact (IC) during SDVJ was significantly higher in the ACLR group compared to the healthy group (P=0.01). However, no significant differences were observed in peak knee flexion (P=0.7). Additionally, peak ground reaction force (vGRF) and rate of loading (ROL) at IC significantly increased in the ACLR group compared to the healthy group (P=0.002, P=0.001).
Conclusion:
Considering the altered kinematics of the knee joint in the ACLR group and the increased risk of re-injury, post-surgery exercises and rehabilitation should focus on modifying athletes' techniques. The elevated vGRF in the ACLR group corresponds to an increased ROL, indicating a stiff system during skill performance and a heightened risk of ACL re-rupture. Therefore, athletes should receive feedback from sports coaches to control and adjust ROL while enhancing overall sports performance.
Keywords