| Grant number: | 18/20362-8 |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |
| Start date: | December 01, 2018 |
| End date: | November 30, 2019 |
| Field of knowledge: | Health Sciences - Physiotherapy and Occupational Therapy |
| Principal Investigator: | Paulo Roberto Pereira Santiago |
| Grantee: | Dayanne Rodrigues Pereira |
| Host Institution: | Escola de Educação Física e Esporte de Ribeirão Preto (EEFERP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil |
Abstract Introduction: Postural control or balance is a state of stability in which there is no acceleration or deceleration of body movement, characterized by maintaining a vertical projection of the center of gravity within the margins of the support base. Its maintenance is dependent on the proper functioning and integration of the visual, vestibular and proprioceptive systems. In its turn, the fatigue is characterized as an acute incapacity in muscular performance and significantly affects the movement control of the proprioceptive system of the joints, diminishing the reproductive capacity of the region through the loss of efficiency of muscle receptors or the decrease of muscle function, interfering directly in the control of posture, leading to a greater probability of injuries in handball athletes, mainly females. Objective: To investigate the effect of a handball-specific fatigue protocol in postural control of female athletes. Materials and methods: This is a longitudinal cross-sectional study covering the eight weeks of preventive training in 30 female handball athletes. The semi-static postural control will be evaluated, and the maximum vertical jump after the fatigue protocol executions. The maximum vertical jump will be measured under a Bertec platform (size: 40 x 60 cm) (Columbus, OH, USA) operating at 2000 Hz frequency. At the end the circuit the heart rate will be quantified and a subjective perception of effort (BORG 0-20) will checked. The fatigue situation will be characterized by lack of maintenance of the speed and / or 30% reduction of the maximum voluntary contraction performed at the beginning of the protocol. The displacement of the pressure center will be calculated. All data processing will be performed by routines elaborated in Matlab® environment. | |
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