Relação entre modificações cinemáticas da corrida e o tempo limite na vVO2máx

Abstract

-Exhaustive running at maximal oxygen uptake velocity (vVO 2max ) can alter running kinematic parameters and increase energy cost along the time. The aims of the present study were to compare characteristics of ankle and knee kinematics during running at vVO 2max and to verify the relationship between changes in kinematic variables and time limit (Tlim). Eleven male volunteers, recreational players of team sports, performed an incremental running test until volitional exhaustion to determine vVO 2max and a constant velocity test at vVO 2max . Subjects were filmed continuously from the left sagittal plane at 210 Hz for further kinematic analysis. The maximal plantar flexion during swing (p<0.01) was the only variable that increased significantly from beginning to end of the run. Increase in ankle angle at contact was the only variable related to Tlim (r=0.64; p=0.035) and explained 34% of the performance in the test. These findings suggest that the individuals under study maintained a stable running style at vVO 2max and that increase in plantar flexion explained the performance in this test when it was applied in non-runners.