Resumo:
Introduction: CrossFit is a high-intensity, high-complexity exercise program whose number
of followers has been growing steadily in recent years. Since the scientific literature on this
topic highlights the prevalence of injuries and the association with the level of experience in
practicing the sport, better understanding the dynamics of functional movement from this
perspective, according to the time of practice of the sport, can provide valuable information on
how movement is modulated. Objective: to elucidate the differences in motor behavior
between athletes according to their experience in the sport, in relation to linear and non-linear
variables, and the respective motor variability, comparing the biomechanical patterns between
them in the execution of two basic movements. Method: Exploratory cross-sectional study in
which the movement decomposition method was used to evaluate 39 CrossFit athletes, aged
between 18 and 45 years, of all genders, by capturing video images during repetitions of the
Squat and Press. The variables used were trajectory, number of movement elements (N),
percentage distance in relation to the theoretical model (W) and their variability. Categorical
variables were presented as absolute and relative frequency, while continuous data were
presented as mean ± standard deviation (SD), median and interquartile range. Results: There
was a statistically significant difference in the variable W on the vertical axis, between the
beginner group and the other groups, intermediate (H=-68.87; p<0.001) and experienced (H=-
54.48; p<0.001), in both movements. Conclusion: There was no statistically significant
difference in motor variability between the groups, but the values show that experienced
athletes present a change in motor strategy, indicating a significant increase in the similarity
index, with a greater percentage distance from movement optimization in relation to Hoff's
mathematical model.
