Speed abilities belong to the most difficult trained abilities within coordination abilities and therefore it is necessary to look for such methods, means and forms that are effective for their development (Bompa, 1999). The research objective was to find out about the effect of external supplementary resistance usage on the speed of elite football players` instep kick and to find out possible changes in kinematical parameters of the kick. Methods All players were professionals (n = 8, age = 24,0± 4,7 years, height = 179,5 ± 4,1 cm and weight = 70,4 ± 5,1 kg). The sample was randomly divided into resistance group (RG) and control group (CG). Ankle weight resistance (0 % or 1 % from the body weight of player) was an experimental factor. The usage of ankle band weight was applied 2x / week in speed load, or in technical training focused on shooting. There was 383 minutes when training with ankle band weights totally, which means 8,09 % of total load 4732 minutes. We observed maximum speed of the ball after the kick and the chosen spatio-temporal characteristics of the kick. To gain data we used 3D kinematical analysis and radar device STALKER ATS. From evaluative methods we used ANOVA RM 2 x 2, Bonferonni correction for multiple average comparisons, effect size and magnitude of increasing (Thomas and Nelson, 1996). Results We discovered significant relation between interaction of both factors (time x resistance) F(1,6) = 9.73, p < 0.05, ?2 = 0.40. The main effect of time was also significant F(1,6) = 8.89, p < 0.05, ?2 = 0.36. The level of speed of the ball after the instep kick increased in RG from pre-test values (M1 = 31.62 m/s, SE1 = 0.69 m/s) to post-test values M2 = 32.73 m/s, SE2 = 0.88 m/s), F(1,6) = 18.62; p < 0.01. From the point of view of effect size evaluation, middle effect was discovered ESRG = 0.63. The importance of intervention increase is MOIRG = 3.51 %. The speed of the ball in CG did not show changes between pre-test values (M1 = 32.01 m/s, SE1 = 0.69 m/s) and post-test values (M2 = 31.99 m/s, SE2 = 0.88 m/s), F(1,6) = 0.01; p = 0.93. Regarding mater-of-fact significance there was no intervention effect indicated in the difference between averages of input and output values of speed of the ball when ESCG = 0.01 and importance of increase MOICG = 0.09 %. We did not find changes during evaluation of kinetic structure of the kick in any group. Conclusion It appears that the external resistance method may positively influence the shooting speed and the supplemented resistance is not terminal as the spatio-temporal characteristics did not change.
© Copyright 2009 14th annual Congress of the European College of Sport Science, Oslo/Norway, June 24-27, 2009, Book of Abstracts. Veröffentlicht von The Norwegian School of Sport Sciences. Alle Rechte vorbehalten.