Objective

Sport specific consideration, different demands of various sports and specific training reveal differences of trunk strength capacity. The purpose of this study was to identify strength firstly characteristics of isokinetic parameters of trunk of athletes and secondary to detect the difference and the effect of sports.

Material/Patients and methods

Sixteen athletes of national team athletes were recruited for the study: weightlifting and wrestlers to participate in this study. All athletes were healthy and free of any apparent neuromuscular injury or impairment.

Torque and angular velocity data were collected using a Biodex ^® dynamometer system 3. Muscular strengths of the extensors and flexors of the trunk segment, were assessed using the dynamometer. Flexion and extension strengths were tested at velocities of 60°/second and 180°/second respectively for 5 and 10 reptations (Julia et al., 2010).

Results

First results revealed that extensor muscular are statistically stronger and power than flexor muscular at all angular velocities in the total group ( P < 0.05). The increase of angular velocities 60°/s to 180°/s lead to decrease in PT/BW. Whereas the variation of ratio is not significant.

Comparison of the groups shows that a statically differences are obtained only for flexor muscular. Wrestlers are stronger at 60°/s and power at 180°/s than weightlifters ( P < 0.05).

Discussion/Conclusion

Our data shows that extensors muscular are statically stronger than flexor muscular at all angular velocities and for all variables, at exception of ratio. These results are comparable to those obtained by O’Donovan (2006) for athletic group (Tae Kwon Do and Kung-Fu). Whereas different of results obtained by Secchi (2010) for higher level of swimmers group. The repetitive mechanical loading and often specific and unique motion impose bigger request of specific muscles groups on the spines of athletes through various sporting requirements in training and competition (Hoskins, 2012). However, this muscle specialization may lead to an imbalance of the forces applied and expose the athletes to injuries (Schiltz, 2009), particularly in sports that carry specific low back demands us weight lifters and wrestling. Isokinetic evaluation is frequently used to assess muscle strength of athletes among different sports. Isokinetic dynamometry testing has been a reliable and validated means of testing athletic strength variables (Jiang, 2013).