Reliability in the Ability to Self-regulate Sprint Intensity in Male Professional Soccer Players

According with the purpose of this study, 15 professional male soccer players were recruited, and sprint Vmax 30 m measured in partials 60%, 70%, 80%, 90%, 100% intensity, using Global Positioning Systems devices (GPS). The protocol measurements was 2 days testing separated by a week. order randomized both subjects execution intensities. statistical analysis performed Student's T-test for paired data, repeated measures ANOVA. Changes observed when it requested to vary intensity 10% (p<0.05). Without precision (p <0.05) speed higher than (65.66% ± 5.64%, 74.65% 5.84%, 86.1% + 4.3% Vmax), while partial 90% (87.93% 5.81%) similar that (p> 0.05) although slightly lower. In conclusion, are capable varying change is verbally requested, but without exceeding indicated except intensities close 90%), which precise results research, use objective feedback methods may be necessary, planning running submaximal speed.