OXYGEN UPTAKE KINETICS IN ATHLETES AND SEDENTARY MEN

Abstract

1678 The purpose of this study was to compare the oxygen uptake kinetics in athletes (ATHL) and sedentary (SED) men. We Tested 17 males (9 athletes and 8 sedentary, age 26,65 ± 5,04 years old, height 174,91 ± 6,99 cm and weight 70,29 ± 11,08 kg). Both groups were submitted to 2 treadmill tests. In the first one we applied a maximal incremental test to measure maximal oxygen uptake (VO2 max) and ventilatory anaerobic threshold (VAT) expressed in running speed (RS) (km/h) and in % VO2 max (AT%VO2 max). In another day we started measuring the resting VO2 during 5 min and just after the sudden increase of VO2 due to the beginning of ATRS run until 8 min long. (VACUMED VISTA CPX metabolic system). (Table)TableThe kinetics was analyzed considering as a reference the 6 th. minute running VO2 average as a steady state VO2 (SSVO2). Comparing the each minute measurement as a percent of SSVO2 (Mann Whitney test) we noted a significant difference only in the third minute (p=0,0433) of the ATRS run test, suggesting a oxygen uptake kinetics slow component faster in athletes than in sedentary men.