ASSOCIATION BETWEEN THE SHOULDER ANGULAR VELOCITY AND THE PEAK TORQUE OF THE SHOULDER ROTATORS IN THE ATTACK OF VOLLEYBALL

  • : RAFAEL MENDONÇA¹, ALEX FAGUNDES¹, PEDRO SCHONS¹, HENRIQUE BIANCHI¹, LEONARDO TARTARUGA¹
  • : ¹Federal University of Rio Grande do Sul (Porto Alegre, RS)
  • : Introduction: Several factors influence the definition of the point in volleyball. The attack ball speed (ABS) is determinant to obtain the point (Forthomme et al., 2005) and is directly linked to the upper limb's ability to generate force quickly. Therefore, it is essential that there is an increase in strength in the shoulder muscles, in addition to the prevention of injuries that can be caused by muscular imbalance (Hadzic, 2014). The objective of the present study was to analyze the association between the shoulder angular velocity (SAV) in the attack gesture and the peak torque of the shoulder rotators (PTR) with the ABS of professional volleyball players. Materials and methods: Seven professional male volleyball players, (93.8 ± 7.9 kg body mass and 198.3 ± 5.0 cm height), were instructed to perform 3 maximum attacks directed to the parallel of the court. The actions were recorded using two video cameras Cásio-EX ZR1000 (Tokyo, Japan) synchronized, with a 120 Hz sampling rate, one used to record the attack gesture and the other to record the displacement of the ball. The videos were analyzed in the Kinovea 8.15 program. The parameters of strength were evaluated in an isokinetic dynamometer (Cybex Norm, Ronkonkoma, NY, USA). This study was approved by the research ethics committee nº 1464312. Results: There was no correlation between SAV with ABS. However, SAV correlated positively with the functional ratio. Conclusion: We found a strong correlation between the angular velocity of the shoulder and the functional ratio of the internal and external rotators of the shoulder. Demonstrating the importance of the action of external rotators in the braking of the movement, both as a prophylactic action and aiming to provide greater transfer of energy between the hand and the ball.
  • : biomecânica_do_esporte
  • : rafael.smendonca@hotmail.com