This study examined performance and physiological responses (power output, tissue saturation index) to repeat sprint cycling with oxygen supplementation (O 2 Supp [fraction of inspired oxygen 1.00]). Fourteen amateur male cyclists took part. Two visits to the laboratory entailed; 15min relative intensity warm-up, 10min of passive recovery, followed by 10x15s repeated sprints, during which air inspired had FiO 2 1.00 oxygen or normal air. Outcome measures include, mean power (W) and change in Tissue Saturation Index (ΔTSI%). Repeated measures ANOVA were used to examine difference between conditions in mean power output. Paired samples t-tests were used to examine differences between conditions in ΔTSI (%) and rate of muscle reoxygenation and deoxygenation (%·s -1 ). Mean power output was 4% higher in the oxygen condition compared to normoxia ( p < .01). There was a significant positive correlation between power output and reoxygenation rate during O 2 Supp (r = 0.65, p = .04). No correlation was seen between power output and reoxygenation rate during normoxia (r = -0.30, p = .40). A significantly increased deoxy rate was seen in the O 2 Supp condition compared to normoxia ( p = .05). Oxygen supplementation appears to elicit the greatest performance improvements in mean power, potentially facilitated by an increasing muscle reoxygenation rate. This evidences the utility of oxygen as an ergogenic aid to in cycling performance.

中文翻译：

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重复短跑骑行期间急性氧补充对肌肉组织饱和度的影响

该研究检查了在补充氧气（O 2 Supp [吸入氧的分数 1.00]）的情况下重复冲刺循环的表现和生理反应（功率输出、组织饱和度指数）。十四名业余男性自行车手参加了比赛。需要两次参观实验室；15 分钟的相对强度热身，10 分钟的被动恢复，然后是 10x15 秒的重复冲刺，在此期间吸入的空气含有 FiO 2 1.00 氧气或正常空气。结果测量包括平均功率 (W) 和组织饱和指数的变化 (ΔTSI%)。重复测量方差分析用于检查平均功率输出条件之间的差异。配对样本 t 检验用于检查 ΔTSI (%) 和肌肉再氧合和脱氧速率 (%·s -1 ) 中的条件之间的差异。与常氧条件相比，氧气条件下的平均功率输出高 4% (p < .01)。在 O 2 补充期间，功率输出和再氧合速率之间存在显着的正相关（r = 0.65，p = .04）。在常氧期间，功率输出和复氧率之间没有相关性（r = -0.30，p = .40）。与常氧相比，O 2 补充条件下的脱氧率显着增加 (p = .05)。补充氧气似乎引起了平均功率的最大性能改进，这可能通过增加肌肉再充氧率来促进。这证明了氧气作为提高骑行性能的增能辅助剂的效用。在常氧期间，功率输出和复氧率之间没有相关性（r = -0.30，p = .40）。与常氧相比，O 2 补充条件下的脱氧率显着增加 (p = .05)。补充氧气似乎引起了平均功率的最大性能改进，这可能通过增加肌肉再充氧率来促进。这证明了氧气作为提高骑行性能的增能辅助剂的效用。在常氧期间，功率输出和复氧率之间没有相关性（r = -0.30，p = .40）。与常氧相比，O 2 补充条件下的脱氧率显着增加 (p = .05)。补充氧气似乎引起了平均功率的最大性能改进，这可能通过增加肌肉再充氧率来促进。这证明了氧气作为提高骑行性能的增能辅助剂的效用。