Determination of appropriete number of repetition to evaluate the freestyle swimming turn

The aim of this study was to develop a procedure of data collection on freestyle swimming turn (number of repetition). Eleven swimmers executed 8 turns each one. The measured variables were Normalized Peak Force (PFn), Contact Time (TC), Impulse (Imp) and Turn Time in 10 meters (TV10m). The visual stability as for the number of executions was checked through the calculation of the accumulate coefficient of variation that presents small variations curves. No significant differences were found between the accumulate averages using ANOVA between the different groupings and also for the confirmation of the least number of repetitions, it chose in confronting the data, through the Mann-Whitney U test carried out between the variables. Was found that three valid executions are enough to evaluate the performance in front freestyle turn.