Institute of Physiology of Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, 50 Pervomayskaya Str., 167982 Syktyvkar, Russia.
Cells. 2021 Dec 23;11(1):39. doi: 10.3390/cells11010039.
The purpose of our study was to identify the features of metabolic regulation in highly trained cross-country skiers of different qualifications at different stages of the maximum load test. We examined 124 highly trained cross-country skiers (male, ages 17-24). The group consisted of two subgroups based on their competition performance: 61 nonelite athletes (Group I) and 63 elite athletes (group II), who were current members of the national team of the Komi Republic and Russia. The bicycle ergometer test was performed by using the OxyconPro system (Erich Jaeger, Hoechberg, Germany). All the examined athletes performed the exercise test on a cycle ergometer "until exhaustion". The results of our research indicate that the studied groups of athletes with high, but different levels of sports qualifications are a convenient model for studying the molecular mechanisms of adaptation to physical loads of maximum intensity. Athletes of higher qualifications reveal additional adaptive mechanisms of metabolic regulation, which is manifested in the independence of serum lactate indicators under conditions of submaximal and maximum power from maximal oxygen uptake, and they have an NO-dependent mechanism for regulating lactate levels during aerobic exercise, including work at the anaerobic threshold.
我们的研究目的是确定不同资质的高水平越野滑雪运动员在最大负荷测试的不同阶段代谢调节的特征。我们检查了 124 名高水平越野滑雪运动员（男性，年龄 17-24 岁）。该组由两个基于比赛表现的子组组成：61 名非精英运动员（第 I 组）和 63 名精英运动员（第 II 组），他们是科米共和国和俄罗斯国家越野滑雪队的现役成员。自行车测力计测试使用 OxyconPro 系统（德国 Erich Jaeger，Hoechberg）进行。所有接受检查的运动员都在自行车测力计上进行了“直到力竭”的运动测试。我们的研究结果表明，具有不同但较高运动资质水平的研究运动员群体是研究适应最大强度体力负荷的分子机制的便利模型。较高资质的运动员表现出代谢调节的额外适应机制，这表现在血清乳酸指标在亚最大和最大功率下与最大摄氧量无关，并且在有氧运动期间（包括在无氧阈工作时），它们具有依赖于 NO 的调节乳酸水平的机制。
