Human Performance Research Group, Center for Health and Sport Science, Santa Catarina State University, Florianópolis, Santa Catarina State, Brazil.
PLoS One. 2015 Aug 7;10(8):e0133785. doi: 10.1371/journal.pone.0133785. eCollection 2015.
To investigate the impact of different training backgrounds on pulmonary oxygen uptake (V̇O2) responses during all-out and supramaximal constant-velocity running exercises, nine sprinters (SPRs) and eight endurance runners (ENDs) performed an incremental test for maximal aerobic velocity (MAV) assessment and two supramaximal running exercises (1-min all-out test and constant-velocity exercise). The V̇O2 responses were continuously determined during the tests (K4b2, Cosmed, Italy). A mono-exponential function was used to describe the V̇O2 onset kinetics during constant-velocity test at 110%MAV, while during 1-min all-out test the peak of V̇O2 (V̇O2peak), the time to achieve the V̇O2peak (tV̇O2peak) and the V̇O2 decrease at last of the test was determined to characterize the V̇O2 response. During constant-velocity exercise, ENDs had a faster V̇O2 kinetics than SPRs (12.7 ± 3.0 vs. 19.3 ± 5.6 s; p < 0.001). During the 1-min all-out test, ENDs presented slower tV̇O2peak than SPRs (40.6 ± 6.8 and 28.8 ± 6.4 s, respectively; p = 0.002) and had a similar V̇O2peak relative to the V̇O2max (88 ± 8 and 83 ± 6%, respectively; p = 0.157). Finally, SPRs was the only group that presented a V̇O2 decrease in the last half of the test (-1.8 ± 2.3 and 3.5 ± 2.3 ml.kg-1.min-1, respectively; p < 0.001). In summary, SPRs have a faster V̇O2 response when maximum intensity is required and a high maximum intensity during all-out running exercise seems to lead to a higher decrease in V̇O2 in the last part of the exercise.
为了探究不同训练背景对全力和超最大恒速跑运动中肺氧摄取量（V̇O2）反应的影响，9 名短跑运动员（SPRs）和 8 名耐力跑运动员（ENDs）进行了递增测试以评估最大有氧速度（MAV），并进行了 2 项超最大跑运动测试（1 分钟全力跑测试和恒速跑测试）。在测试过程中连续测定 V̇O2 反应（K4b2，Cosmed，意大利）。在 110%MAV 的恒速测试中，使用单指数函数描述 V̇O2 起始动力学，而在 1 分钟全力跑测试中，测定 V̇O2 峰值（V̇O2peak）、达到 V̇O2peak 的时间（tV̇O2peak）和测试最后 V̇O2 的下降值，以特征化 V̇O2 反应。在恒速运动中，ENDs 的 V̇O2 动力学比 SPRs 更快（12.7 ± 3.0 比 19.3 ± 5.6 s；p < 0.001）。在 1 分钟全力跑测试中，ENDs 的 tV̇O2peak 比 SPRs 慢（分别为 40.6 ± 6.8 和 28.8 ± 6.4 s；p = 0.002），而与 V̇O2max 相比，V̇O2peak 相似（分别为 88 ± 8 和 83 ± 6%；p = 0.157）。最后，只有 SPRs 在测试的后半段出现 V̇O2 下降（分别为-1.8 ± 2.3 和 3.5 ± 2.3 ml.kg-1.min-1；p < 0.001）。总之，当需要最大强度时，SPRs 的 V̇O2 反应更快，而在全力跑运动中具有较高的最大强度似乎会导致运动最后部分 V̇O2 的下降更高。
