Análise da estabilidade do tornozelo em movimentos esportivos e o efeito da órtese semi-rígida

• Autor(a) principal: Milanezi, Fernanda Cristina [UNESP]
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/108697
• topic: Cinesiology; Cinesiologia; Estabilidade; Biomecânica; Entorse; Lesões corporais; Órtese; Tornozelos

The ankle stability is an essential requirement for proper performance of the movement, however there is still no consistent understanding of ankle stability in dynamic situations. Worldwide, there is an increase in sports practice, with this there is an increased occurrence of injuries, especially ankle sprains. After ankle sprain, many individuals continue to report a feeling of instability. This dysfunction is known as Functional Ankle Instability (FAI) and causes several changes in ankle function. One method that is prescribed for the prevention of ankle sprain is the use of bracing, but the mechanism of action of this device is still not well understood in dynamic situations such as walking, running, jumping and other athletic movements. Thus, the present study aims to analyze the stability of the ankle using biomechanical variables (EMG, kinematics, kinetics) in individuals with and without functional ankle instability during the realization of common sports movements with and without an orthosis. This study involved 24 female volunteers, recreational athletes, recruited from a university population, who were divided into two groups: control group and the group with IFT. The subjects performed a torque assessment in isokinetic tests with five concentric/concentric and concentric/eccentric contractions speed of 30 °/s in inversion and eversion and three isometric eversion and inversion. Furthermore, performed sense of force (without visual feedback) and torque steadiness (with visual feedback) inversion and eversion, in which contraction held for 15 seconds at 25 % and 50% of CVIM test. The volunteers also underwent the following sports movements: walking, running, vertical jump, side jump, lateral displacement and cutting with and without bracing, and they had five attempts for each sports movement with two minutes between each motion block. During sports movements collected kinematic, kinetic and electromyographic data were...