Effects of resistance training with elastic resistance on performance of the hip flexion of ballet dancers

Abstract

For development and support of movements with large range of motion, a dancer needs to develop flexibility and muscular strength. There is lack of scientific studies about the effect of the different training methods on the production of muscle strength in large ranges of motion. Thus, the objective of this study was to investigate the effects of a strength training program with elastic resistance on the torque, passive and active range of motion and the angle and time of contraction at largest hip flexion in classical ballet dancers. The study included 15 dancers who were divided into two groups: intervention group (n = 8) and control group (n = 7).During the study, all participants performed their usual routine of ballet classes, but the intervention group was submitted to strength training with elastic resistance, which occurred twice a week for six weeks. Torque, the passive and active range of motion, the angle and time of largest hip flexion were assessed during pre and post intervention period. One-way ANOVA (group) with repeated measures was used to identify the effects of the intervention. The intervention group showed increases in the torque when compared to the control group (intervention group = 38.47% and control group = 13.13%). Increments of 125.25% for the time of contraction at the largest hip flexion were observed only for the intervention group. No effects were identified for the other variables. The present findings showed that strength training with elastic resistance generates increases in torque and in the time of contraction at largest angle of hip flexion in classical ballet dancers.