Pardono Emerson, Sotero Rafael da Costa, Hiyane Wolysson, Mota Marcio Rabelo, Campbell Carmen Silvia Grubert, Nakamura Fábio Yuzo, Simões Herbert Gustavo
Laboratory of Physical Evaluate and Training, Catholic University of Brasília, Taguatinga, Brazil.
J Strength Cond Res. 2008 Jul;22(4):1073-80. doi: 10.1519/JSC.0b013e318173c594.
In this study, we compared the maximal lactate steady state (MLSS) with lactate minimal (LM) intensities determined visually and through a quadratic polynomial function of selected stages of LM test. Eleven male recreational cyclists (27.7 +/- 4.5 years, 175.7 +/- 5.6 cm, 69.5 +/- 10.8 kg, and 12.0 +/- 5.5% body fat) performed one LM test under previous induction of hyperlactaemia with an initial intensity of 75 W with 30-W increments every 3 minutes with blood lactate concentration (HLa) and rating of perceived exertion (RPE) measurements. The LM intensity was determined visually (VLM) and by modeling the lactate response through polynomial function by using: 1) all stages (LMP); 2) the first stage, the stage corresponding to RPE-13 and the last stage/exhaustion (LMP3max); 3) the three lowest lactate concentration stages (LMP3adj); and 4) the initial, RPE-13, and RPE-16 stages (LMP3sub). The MLSS was determined as the highest intensity at a variation not greater than 0.05 mmol.l.min of HLa during the last 20 minutes of a 30-minute exercise session. The MLSS (204.0 +/- 16.0 W), VLM (198.6 +/- 15.2 W), LMP3adj (190.4 +/- 12.9 W), and LMP3sub (192.1 +/- 27.2 W) were not different, well correlated, and in agreement to each other. In conclusion, the polynomial modeling of HLa response to three submaximal stages produced exercise intensities that did not differ from MLSS.
在本研究中，我们将最大乳酸稳态（MLSS）与通过目视确定以及通过乳酸最小（LM）测试选定阶段的二次多项式函数确定的乳酸最小（LM）强度进行了比较。11名男性业余自行车运动员（年龄27.7±4.5岁，身高175.7±5.6厘米，体重69.5±10.8千克，体脂率12.0±5.5%）在先前诱导高乳酸血症的情况下进行了一次LM测试，初始强度为75瓦，每3分钟增加30瓦，并测量血乳酸浓度（HLa）和主观用力程度（RPE）。LM强度通过目视（VLM）以及通过使用多项式函数对乳酸反应进行建模来确定：1）所有阶段（LMP）；2）第一阶段、对应RPE-13的阶段和最后阶段/力竭阶段（LMP3max）；3）三个最低乳酸浓度阶段（LMP3adj）；4）初始阶段、RPE-13阶段和RPE-16阶段（LMP3sub）。MLSS被确定为在30分钟运动时段的最后20分钟内HLa变化不大于0.05毫摩尔/升·分钟时的最高强度。MLSS（204.0±16.0瓦）、VLM（198.6±15.2瓦）、LMP3adj（190.4±12.9瓦）和LMP3sub（192.1±27.2瓦）无差异，相关性良好且相互一致。总之，对三个次最大阶段的HLa反应进行多项式建模所产生的运动强度与MLSS无差异。
