a Higher Institute of Sports and Physical Education of Kef, Jendouba University, University campus of Boulifa, 7100 Le Kef, Tunisia
b Research Unit “Athletic performance and physical rehabilitation” of the High Institute of Sport and Physical Education of Kef, 7100 Le Kef, Tunisia
c Higher Institute of Sports and Physical Education of Ksar-Said, Manouba University, 2010 Manouba, Tunisia
d Biomechanics, Biomaterials and 3D imaging Laboratory, National Institute of Orthopaedics, 2010 Manouba, Tunisia
e Research Center on Sport and Movement (CeRSM), Sciences and Techniques of the Physical and Sporting Activities (UFR STAPS), University Paris Ouest Nanterre La Defense, 200, avenue de la République, 92000 Nanterre Cedex, France
“Objective To investigates into the relationship between concentric isokinetic strength and explosive force of the knee extensors among elite taekwondo players.
Materials and methods Fifteen senior male taekwondo players performed an Isokinetic Test at two different angular velocities (i.e., 60°/s and 180°/s) and a Five-Jump Test (5JT). The isokinetic parameters are the peak torque (PT), the average power (AP), the acceleration time (AT) and the peak torque time (TPT). 5JT variables are the absolute performances, relative to the lower limb size and related to body mass performances.
Results The performance in the horizontal expansion of taekwondo athletes is correlated to the quadriceps concentric isokinetic strength parameters. The PT and AP are correlated to the performance of 5JT brought back in the athlete’s body mass, for the two speeds (P < 0.05). The TPT is correlated with a lower limbs length for the slow speed (60°/s). No significant correlation between the AT and all 5JT values for both test speeds.
Conclusion The size of the lower limbs and body mass athlete are so critical in 5JT performance and isokinetic testing speeds selected. The 5JT can be an effective way to evaluate the explosive strength of the lower limbs (i.e., flexors/extensors of hip, knee and ankle) predominately in taekwondo players.”
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