A percepção de assimetrias em indivíduos ativos durante exercícios de saltos e aterrisagens

Abstract

Different types of jumps are tasks that involve similar mechanical demand among the lower limbs, which leads us to believe that the typical profile of the movement would be one of symmetry. In addition, these tasks are part of training in different modalities and are also important components of rehabilitation programs. Thus, the objective of this study was to verify whether asymmetries in impact force in jumping tasks are perceived by practitioners of physical exercise. Nineteen physically active individuals of both sexes, aged between 18 and 40 years, were evaluated. The participants performed a protocol that constituted a warm-up on the running treadmill at different speeds and jumps: countermovement, half-squat jump, drop jump, horizontal jump. Variables of interest were peak vertical ground reaction force (FRSV), time of FRSV peak, and impact rate. When comparing the different jumps, the FRSV peak differed between the preferred and non-preferred leg only in the drop jump (t = 3.35; df = 18, P = 0.003). In the other jumps, countermovement (t = 1.859, df = 18, P = 0.079), horizontal jump (t = 0.265; df = 18, P = 0.793) and half squat jump (t = 0.998; df = 18, P = 0.331 ). We conclude that the perceptions have a strong correlation between the preferred and non-preferred leg can be indicative for a better discernment of these asymmetries, and that among the vertical jumps in the study, the drop jump can be more useful to detect asymmetries. Including the participants' perception of asymmetries can be an important strategy for knowing when to evaluate.