Which Muscle Contraction Characteristics are Most Impaired By Adductor-Related Groin Pain?
Poster Presentation
Paper ID : 1483-SSRC
Authors
1Ph.D. of Sports Biomechanics, Department of Biomechanics and Sports Injuries, Faculty of Physical Education and Sport Science, Kharazmi University, Tehran, Iran.
2Associate Professor, Department of Biomechanics and Sports Injuries, Faculty of Physical Education and Sport Science, Kharazmi University, Tehran, Iran.
3Assistant Professor, Department of Applied Physiology, Health, and Clinical Sciences, the University of North Carolina at Charlotte, Charlotte, NC, USA.
Abstract
Background and aims:
Adductor Related Groin Pain (AGP) is a common condition among athletes that affects their muscle strength and isokinetic profile. However, the effects of different types of muscle contractions in AGP conditions have not been investigated; Therefore, this study aimed to evaluate which muscle contraction characteristic is most impaired by AGP.
Method:
32 professional soccer players (control group (n=16) and AGP group (n=16)) who took part in the first and second division leagues participated in this case-control study. The isokinetic dynamometer (BIODEX V.4) with a speed of 90 degrees per second was used to quantify concentric and eccentric adductor group muscle's mean power, relative peak torque, rate of torque development, and acceleration time. An independent sample t-test was used to compare the differences between the groups in each contraction mode at a significance level of 0.05. Matlab and Origin Pro (V.2022) software were used to analyze and visualize data.
Results:
The t-test results showed that the AGP group had significantly lower mean power (35% vs 10%), relative peak torque (36% vs 23%), and rate of torque development (72% vs 1.6%), and significantly higher acceleration time (146% vs 1%), in concentric contraction than the control group (P≤0.05). No significant differences were found between the groups in eccentric contraction.
Conclusion:
The results indicated that AGP affects concentric contraction more than eccentric contraction. These findings support the muscle theory that muscles use more muscle fibers in concentric contraction than in eccentric contraction under the same conditions. Trainers and therapists should consider the concentric contraction demands in their rehabilitation programs for athletes with AGP.
Adductor Related Groin Pain (AGP) is a common condition among athletes that affects their muscle strength and isokinetic profile. However, the effects of different types of muscle contractions in AGP conditions have not been investigated; Therefore, this study aimed to evaluate which muscle contraction characteristic is most impaired by AGP.
Method:
32 professional soccer players (control group (n=16) and AGP group (n=16)) who took part in the first and second division leagues participated in this case-control study. The isokinetic dynamometer (BIODEX V.4) with a speed of 90 degrees per second was used to quantify concentric and eccentric adductor group muscle's mean power, relative peak torque, rate of torque development, and acceleration time. An independent sample t-test was used to compare the differences between the groups in each contraction mode at a significance level of 0.05. Matlab and Origin Pro (V.2022) software were used to analyze and visualize data.
Results:
The t-test results showed that the AGP group had significantly lower mean power (35% vs 10%), relative peak torque (36% vs 23%), and rate of torque development (72% vs 1.6%), and significantly higher acceleration time (146% vs 1%), in concentric contraction than the control group (P≤0.05). No significant differences were found between the groups in eccentric contraction.
Conclusion:
The results indicated that AGP affects concentric contraction more than eccentric contraction. These findings support the muscle theory that muscles use more muscle fibers in concentric contraction than in eccentric contraction under the same conditions. Trainers and therapists should consider the concentric contraction demands in their rehabilitation programs for athletes with AGP.
Keywords