Influence of ankle instability in jumping performances and dynamic balance of amateur dancers

• Grant number: 21/04791-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: September 01, 2021
• End date: July 31, 2022
• Field of knowledge: Health Sciences - Physical Education
• Principal Investigator: Karine Jacon Sarro
• Grantee: Julia Martins Portugal
• Host Institution: Faculdade de Educação Física (FEF). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

Dance requires a lot of work of the lower limbs, especially in some modalities, such as classical ballet. Ankle sprains and strains are some of the most common types of injuries in dancers, after all, the work with the body is exhausting and a small imbalance can cause an injury. However, since ankle instability is a recurring problem in dancers, this question arises: do dancers diagnosed with CAI exhibit different results when landing in classical ballet jumps? With this question, the objective of this research is to evaluate if the results when landing from a ballet jump are different between amateur dancers with and without ankle instability. The study will have the participation of 34 amateur dancers, over 18 years old, 17 with unilateral ankle instability and 17 for the control group, without ankle instability. Participants will have dynamic balance and plantar support assessed on the landing of 3 jumps, 2 of which are used in ballet classes, and a clinical jump. The jump balance and its performance will be assessed by a force platform, while the plantar support region will be identified by a dynamic plantar pressure assessment system. Among the tests that will be used, the Shapiro-Wilk test will be performed to determine the normal distribution of all variables, the anthropometric data and the CAIT score of the two groups will be compared using the t test for independent samples, and for the comparison of each variable will be performed the mixed model ANOVA of 2 factors - group (CG and GI) and member (dominant or affected and non-dominant or unaffected) - with repeated measures in relation to the member. In case of significant interactions, the Tukey test will also be used. Dancers without ankle instability are expected to have better results in landing. (AU)