Monografia (especialização)
Análise da confiabilidade de duas plataformas de força para a coleta simultânea de variáveis dinâmicas para a identificação da assimetria bilateral
Fecha
2015-05-13Autor
Nelise da Cunha Antunes
Institución
Resumen
Introduction: The bilateral asymmetry (BA) between limbs is considered as
major cause of decreased performance and injury in sport. Early identification of
the BA is important for the development of more adequate training and
rehabilitation programs, reducing the possibility of injury and decreases in sports
performance. One of the most widely used methods for the identification of BA is
countermovement jump performed on a force platform. Several studies have
already been conducted in this area and have demonstrated that the dynamic
variables maximal force, impulse and power have a significant reliability in
identifying asymmetries; however, on most of these studies the identification of
asymmetries was done by jumps which were performed in a sequential or
monopodal way. Objective: This study investigated the reliability of two force
platforms, with simultaneous data collection of both lower limbs through the jump
with countermovement in order to identify BA through the dynamic variables
maximal force and impulse. Methodology: The study included 16 athletes of the
Mineira Federation of Tae Kwon Do, with an average age of 20.00 ± 5.18 years
and in average 10.68 ± 4.85 years of sports practice, including 3 females with an
average mass of 59.36 ± 13.75 kg and average height of 166.66 ± 7.50 cm and
13 males with an average weight of 69.86 ± 16.40 kg and average height of
175.15 ± 7.72 cm. A single series containing six CMJ was carried out with no
defined pauses between repetitions, the subject simply jumped and automatically
prepared for the following jump. The collection was performed at a frequency of
1000 Hz. Results: The ICC values for maximal force were 0.900 and 0.864 for
the right and left leg, respectively. For the impulse, the ICC values found were
0.941 and 0.937 for the right and left legs, respectively. Conclusion: The results
indicate that the PFD showed reliability in the acquisition of the measurements
for both variables, therefore validating this procedure on the identification of BA.