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LAFFAYE Guillaume and DEBANNE Thierry

PREDICTION OF BALL VELOCITY DURING STANDING THROW AND GAIN OF VELOCITY OBTAINED WITH 3-STEP RUNNING. LAFFAYE Guillaume and DEBANNE Thierry Department of Sport Sciences, Université Paris- Sud , Orsay , France. Introduction. Players Skill. Combined model. Anthropometric parameters.

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LAFFAYE Guillaume and DEBANNE Thierry

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  1. PREDICTION OF BALL VELOCITY DURING STANDING THROW AND GAIN OF VELOCITY OBTAINED WITH 3-STEP RUNNING LAFFAYE Guillaume and DEBANNE Thierry Department of Sport Sciences, Université Paris-Sud, Orsay, France

  2. Introduction PlayersSkill Combined model Anthropometric parameters Isotonic tests

  3. Difference of ball velocity obtained with 3-step running (Bayios and Boudolos, 1998) Difference of ball velocity in standing position in elite and amateur players (Gorotsiaga et al., 2005) 1. Playersskill

  4. R = .30-.37 Hand Size 2. Anthropometricparameters R .23-.62 Arm span Body mass height Lean Body Mass BMI

  5. 3. Isotonic Tests (r = .55 - .63) R = 0.80

  6. 4. Combined model

  7. GOALS OF THE STUDY investigate the gain of velocity obtained by the 3-steps running investigate the effect of expertise on this gain predict the ball-throwing velocity in three conditions

  8. POPULATION

  9. METHOD Variables: anthropometric parameters BMI= M/H² SSI= H/ /3√M

  10. METHOD Variables: Upper-limb strength

  11. Performance METHOD Rel. Power SQUAT JUMP (SJ) Rel. Force Velocity Variables: Lower-limb strength HOPPING ON PLACE (H5) Reactivity Index Leg Stiffness

  12. DEPENDENT VARIABLES ballvelocity in standing position ballvelocitywith3-steprunning differencebetweenboth

  13. STATISTICAL DESIGN pearsoncorrelation (single regression) Student T-test for independent group Multiple regression design

  14. +8.5 % (Skilled) + 9.4 % (Elite) RESULTS + 13%

  15. Standing velocity

  16. Combined model for Vstand 90 % 10 %

  17. Velocitywith 3-step running

  18. Combined model for V3-step Or 75-84 % 7-19 %

  19. Combined model for the gain of velocity 80-86% 14-20 %

  20. ELITE SKILLED + 13 cm + 17 kg Differencebetweenelite and skilledplayers

  21. References Bayios, I. A., & Boudolos, K. (1998). Accuracy and throwing velocity in handball. In H. J. Riehle & M. M. Vieten (Eds.), Proceedings of XVI Symposium on Biomechanics in Sports (pp. 55–58). Konstanz: University of Konstanz. Debanne, T. & Laffaye, G. (2011). Predicting the throwing velocity of the ball with anthropometric factors and isotonic tests in handball. Journal of Sport Science, 29 (7), 705-13. Gorostiaga, E. M., Granados, C., Ibanez, J., & Izquierdo, M. (2005). Differences in physical fitness and throwing velocity among elite and amateur male handball players. International Journal of Sports Medicine, 26, 225–232. Sheldon, W.H. (1950).the somatotype, the morphophenotype and the morphogenotype.Cold Spring Harbor Symposia of Quantitative Biology, 15, 373-82. Srhoj, V, Marinovic, M & Rogulj, N (2002) Position specific morphological characteristics of top-level male handball players. CollegiumAntropologicum, 26 (1), 219-27. Van den Tillaar, R. & Ettema, G. (2004). Effect of body size and gender in overarm throwing performance. European Journal of Applied Physiology, 91, 413–418.

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