Aisbett B, Le Rossignol P, Sparrow W A
School of Health Sciences, Deakin University, Burwood, Victoria, Australia.
J Sci Med Sport. 2003 Jun;6(2):187-98. doi: 10.1016/s1440-2440(03)80254-2.
The aim of this study was to evaluate the influence of pacing on performance, oxygen uptake (VO2), oxygen deficit and blood lactate accumulation during a 6-minute cycle ergometer test. Six recreational cyclists completed three 6-minute cycling tests using fast-start, even-pacing and slow-fast pacing conditions. Cycle ergometer performance was measured as the mean power output produced for each cycling test. Energy system contribution during each cycling trial was estimated using a modified accumulated oxygen deficit (AOD) method. Blood lactate concentration was analysed from blood sampled using a catheter in a forearm vein prior to exercise, at 2 minutes, 4 minutes and 6 minutes during exercise, and at 2 minutes, 5 minutes and 10 minutes post-exercise. There was no significant difference between the pacing conditions for mean power output (P = 0.09), peak VO2 (P = 0.92), total VO2 (P = 0.76), AOD (P = 0.91), the time-course of VO2 (P = 0.22) or blood lactate accumulation (P= 0.07). There was, however, a significant difference between the three pacing conditions in the oxygen deficit measured over time (P = 0.02). These changes in the time-course of oxygen deficit during cycling trials did not, however, significantly affect the mean power output produced by each pacing condition.
本研究的目的是评估在6分钟的自行车测力计测试中，不同节奏对运动表现、摄氧量（VO2）、氧亏和血乳酸积累的影响。六名业余自行车运动员在快速启动、匀速和先慢后快的节奏条件下完成了三次6分钟的骑行测试。自行车测力计的运动表现通过每次骑行测试产生的平均功率输出进行测量。每次骑行试验中的能量系统贡献采用改良的累积氧亏（AOD）方法进行估算。在运动前、运动过程中的2分钟、4分钟和6分钟以及运动后的2分钟、5分钟和10分钟，使用前臂静脉导管采集血样分析血乳酸浓度。不同节奏条件下的平均功率输出（P = 0.09）、峰值VO2（P = 0.92）、总VO2（P = 0.76）、AOD（P = 0.91）、VO2的时间进程（P = 0.22）或血乳酸积累（P = 0.07）之间均无显著差异。然而，三种节奏条件下随时间测量的氧亏存在显著差异（P = 0.02）。不过，骑行试验中氧亏时间进程的这些变化并未显著影响每种节奏条件下产生的平均功率输出。
