Avaliação de assimetrias bilaterais no agachamento nas condições calçado e descalço por meio do Statistical Parametric Mapping (SPM): resultados preliminares

Abstract

The impact in the kinematic of the squat of the use or not of shoes and the presence of asymmetries is related as a factor who can interfere with performance and the incidence of injuries. Nonetheless, the results are controversial. Most previous studies investigated the kinematic and qualify the asymmetries from minimum and maximum values of the angles, which, in our point of view, despise valuable data from the time-angle curve in different joints. The present study, evaluated the impact of the use or not of shoes on the kinematic and asymmetries of the lower limb during the back squat in nine subjects, with experience in the execution of the exercise, at 85% of one maximal repetition, through a Statistical Parametrical Mapping (SPM). The results don’t show significative differences in the kinematic of the movement in both conditions (shoes x no shoes) as well the presence or not of shoes don't significantly interfere with movement asymmetry. We conclude that asymmetries are very individual and the high variability observed, principally, in the hip and ankle joints, may have contributed for the lack of evidences in finding asymmetric patterns, regardless of the condition (shoe or no shoe). However, the possibility of using SPM for identify, in a statistically rigorous way, movement areas influenced by experimental conditions, training level or training fatigue can provide a significant contribution for the analysis and understanding of the asymmetries in the Sports Biomechanics. Future studies with a larger sample size, analysis in other planes of motion, and with more diverse loads are suggested by the research group.