Blood lactate (BL) concentrations were measured in 19 competitive cyclists after 4 competitive track events (kilometre, individual and team pursuit, and match sprints) during the US National Championships. A total of 34 samples were drawn. Our purpose was to investigate the share of anaerobic metabolism in the various events. The greatest mean BL concentration (16.94 mM/l) was found after the kilometre, with one individual recording a value of 18.22 mM/l. A low correlation coefficient for BL versus total riding time was found in the 6 samples drawn during the kilometre (r=0.51) and the 12 samples drawn during the individual pursuit (r=0.44). BL concentrations in all four events were not significantly different (p<0.05) from each other. High values for BL were found in the match sprints (7 samples, mean 13.65 mM/l) an event lasting approximately 11 seconds. The mean BL in the kilometre (6 samples, 16.94 mM/l), individual pursuit (12 samples, 15.18 mM/l), and team pursuit (5 samples, 12.08 mM/l) compare favourably to the values reported for a variety of exercise modes of similar time, except running. While there is increased muscle mass in running, this fact alone may not explain the lower BL values in cycling. It is suggested that lower BL levels may be attributed to prolonged contraction-relaxation phase during cycling causing decreased blood flow to the leg.
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机译：在美国国家锦标赛期间，进行了4次竞技田径比赛（公里，个人和团体追逐以及比赛短跑）后，对19位竞技自行车运动员的血乳酸（BL）浓度进行了测量。总共抽取了34个样品。我们的目的是研究各种事件中厌氧代谢的比例。一公里后发现最大的平均BL浓度（16.94 mM / l），一个人记录的值为18.22 mM / l。在公里期间（r = 0.51）抽取的6个样本和个人追逐期间（r = 0.44）抽取的12个样本中，BL与总骑行时间的相关系数较低。所有四个事件中的BL浓度彼此之间均无显着差异（p <0.05）。在比赛冲刺中发现了较高的BL值（7个样本，平均13.65 mM / l），事件持续约11秒。公里的平均BL（6个样本，16.94 mM / l），个人追踪（12个样本，15.18 mM / l）和团队追踪（5个样本，12.08 mM / l）与报告的各种除了跑步以外，其他时间的锻炼方式相似。虽然跑步中肌肉质量增加，但仅凭这一事实并不能解释自行车运动中较低的BL值。提示较低的BL水平可能归因于骑行过程中延长的放松松弛期，从而导致流向小腿的血液减少。
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