Wahl Patrick, Manunzio Christian, Zwingmann Lukas, van de Weyer Stefan, Bloch Wilhelm
Department of Molecular and Cellular Sport Medicine, Institute of Cardiology and Sports Medicine, German Sport University Cologne, Germany.
The German Research Centre of Elite Sport Cologne, German Sport University Cologne, Germany.
Biol Sport. 2021 Jun;38(2):285-290. doi: 10.5114/biolsport.2021.99326. Epub 2020 Oct 22.
This study evaluated the accuracy of the reverse lactate threshold (RLT) and the onset of blood lactate accumulation (OBLA; 4 mmol·L) to determine the running speed at the maximal lactate steady state (MLSS) and 5 km running performance in a field test approach. Study 1: 16 participants performed an RLT test, and 2 or more constant-speed tests, lasting 30 minutes each, to determine running speed at the MLSS. Study 2: 23 participants performed an RLT test and a 5000 m all-out run as an indicator of performance. The RLT test consisted of an initial lactate-priming segment, in which running speed was increased stepwise up to ~5% above the estimated MLSS, followed by a reverse segment in which speed was decreased by 0.1 m·s every 180 s. RLT was determined using the highest lactate equivalent ([La]/running speed) during the reverse segment. OBLA was determined during the priming segment and was set at a value of 4 mmol∙L. The mean difference in MLSS was +0.06 ± 0.05 m·s for RLT, and +0.13 ± 0.23 m·s for OBLA. OBLA showed a good concordance with the MLSS (ICC = 0.83), whereas RLT revealed excellent concordance with the MLSS with an ICC = 0.98. RLT showed a very high correlation with 5000 m speed (r = 0.97). The RLT exhibited exceptional agreement to MLSS and 5000 m running performance. Due to this high accuracy, especially concerning the small intraindividual differences, the RLT test may be superior to common threshold concepts. Further research is needed to evaluate its sensitivity during the training process.
本研究评估了反向乳酸阈（RLT）和血乳酸积累起始点（OBLA；4 mmol·L）在现场测试方法中确定最大乳酸稳态（MLSS）时的跑步速度及5公里跑步表现的准确性。研究1：16名参与者进行了RLT测试以及2次或更多次持续30分钟的恒速测试，以确定MLSS时的跑步速度。研究2：23名参与者进行了RLT测试和一次5000米全力跑作为表现指标。RLT测试包括一个初始乳酸激发段，其中跑步速度逐步提高至比估计的MLSS高约5%，随后是一个反向段，速度每180秒降低0.1 m·s。RLT通过反向段期间的最高乳酸当量（[La]/跑步速度）来确定。OBLA在激发段期间确定，并设定为4 mmol∙L的值。RLT测定的MLSS平均差异为+0.06 ± 0.05 m·s，OBLA为+0.13 ± 0.23 m·s。OBLA与MLSS显示出良好的一致性（ICC = 0.83），而RLT与MLSS显示出极佳的一致性，ICC = 0.98。RLT与5000米速度显示出非常高的相关性（r = 0.97）。RLT在MLSS和5000米跑步表现方面表现出卓越的一致性。由于这种高精度，特别是关于个体内差异较小，RLT测试可能优于常见的阈概念。需要进一步研究来评估其在训练过程中的敏感性。
