Estudo comparativo dos parâmetros cinemáticos angulares e lineares da marcha humana em ambiente aquático e terrestre em indivíduos hígidos adultos jovens




There is a great interest to study the human movement under water, once this environment has been used as an alternative way for both training and rehabilitation due to the mechanical properties it offers. However, the amount of information available about this activity is small compared to the one about gait on dry land. The purpose of the present study is to compare the angular and linear kinematic parameters of human gait in water and land environments nineteen male and healthy individuals took part in this study, with average age of 24 years. The individuals were submitted to gait evaluation in both water and land environments. In the water, the individuals walked with the water on the Xiphoid-process level. For that instance, the individuals had their body segments tracked with passive markers in anatomical points: greater trochanter, lateral femoral condyle, lateral malleolus, fifth metatarso-phalangeal joint and glenoumeral joint. For collection of the gait data in both environments the cinemetry resource was used. After the image acquisitions in both environments, they were transferred to a computer with the help of the Adobe Premier-Pro version 7.0 software. Three gait cycles from each individual were selected to obtain the kinematics data. For each gait cycle, markers positions were recovered with the help of a software developed by the research grow, on MATLAB environment. The software applies the direct linear transform (DLT) to obtain real-world coordinates, and calculate linear and angular gait kinematical parameters. The behaviors of hip, knee and ankle angler in water and on land were studied for each gait subfase. The angular and linear gait data were analyzed with the help of Shapiro-Wilk, Fischer and Student t-tests, with a 95% confidence (p<0,05). All linear variables and stride length, stride speed and cadence had lower valves in water compared to dry land, out stride time was longer in water. The angular patterns in water and on land were different. From this work it was possible to observe that walking in water has differences regarding to average joint angler and angular excursion when compared to walking on dry land. Such differences should be taken into account in the planning of a rehabilitation program based on hydrotherapy.


biomecânica locomoção humana cinesiologia fisioterapia engenharia medica