2015, Volume 11, Issue 1

Segmental kick velocity is correlated with kick specific and nonspecific strength performance in a proximodistal sequence



Pedro Vieira Sarmet Moreira1, Leandro Vinhas de Paula2, Antonio Prieto Veloso3

1 Universidade Estadual Paulista “Júlio Mesquita Filho” – UNESP-IB-RC, Brazil
2Centro Desportivo, Universidade Federal de Ouro Preto, Brazil
3Faculdade de Motricidade Humana, Universidade Técnica de Lisboa, Portugal


Author for correspondence: Pedro Vieira Sarmet Moreira; Universidade Estadual Paulista “Júlio Mesquita Filho” – UNESP-IB-RC, Brazil; email: sarmet_treinamento[at]hotmail.com


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Abstract

Background and Study Aim: Fast unloaded movements are typically associated with explosive strength and vertical jump performance, but their relationship with the martial kick velocity has not been studied. The purpose of this study was answer to question if kick velocity is correlated with kick specific and nonspecific strength performance, in a proximodistal sequence. 
Material and Methods: Six male black-belt taekwondo athletes (20.5 ± 4.3 years, 67.1 ± 4.8 kg, 1.78 ± 0.06 m, 21.378 ± 1.9) were tested for various strength indicators isometrically, through a adapted Leg Press machine, and dynamically, through Counter Movement Jump (CMJ) over a force platform, in ground reaction force (GRF), in linear peak velocities (PV) and time to reach PV of lower body segments, during kick, through 3D kinematic analyze at 200 samples/second. 
Results: There were significant differences of timings and velocities between segments, significant correlations between horizontal GRF and nonspecific strength indicators with velocities, especially for CMJ. 
Conclusion: The results indicated that, segmental kick velocity is associated with isometric and stretch shortening cycle performance, but modulated by ground reaction force production in a proximodistal sequence.


Key words: vertical jump, sport performance, explosive strength, ballistic velocity, martial arts