The aim of the research carried out was to establish the direction, and scope of the changes in internal, and external load indicator values in cyclists, men, and women, in high-altitude hypoxia conditions. The participants of the study were mountain bike cyclists, members of Russian and Polish Nationals Teams (women n=11, men n=9). They have done the graded incremental exercise test at the altitude of 170 m (Lonato del Garda, Italy) and 2250 m (Livignio-Trepale Italy). In the course of effort VO2, VE, VCO2 was measured by means of K4b2 analyser (Cosmed Italy). Effort intensity was determined at ventilators thresholds VT1 (AT), and VT2. Internal and external load indicators undergo changes during physical effort in cyclists under the influence of high altitude hypoxia. In groups of men and women, the changes in indicator values reach VE: 9% and 12%, HR: 0,5% and 15, O2HR: 7% and 15%, VO2: 14% and 20% respectively, as well as a decrease in 5 and 4% of the generated power, respectively. A decrease in the generated power by 5%, higher ventilation, amounting to 10%, a higher VO2max, amounting to 17% in hypoxic conditions, in comparison with the conditions similar to those at sea level, show that it is necessary to modify training loads.

中文翻译：

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高海拔缺氧对山地自行车骑手内部和外部训练负荷率变化的方向

进行研究的目的是确定高海拔缺氧条件下自行车手，男人和女人的内部和外部负荷指标值变化的方向和范围。该研究的参与者是山地自行车骑行者，俄罗斯和波兰国家队的成员（妇女n = 11，男性n = 9）。他们已经在170 m（意大利洛纳托·德尔·加尔达）和2250 m（意大利利维尼奥-特雷帕莱）的海拔高度上进行了分级递增运动测试。在努力过程中，VO2，VE，VCO2是通过K4b2分析仪（意大利Cosmed）进行测量的。在呼吸机阈值VT1（AT）和VT2处确定努力强度。在高海拔缺氧的影响下，骑自行车者在进行内力锻炼时，内部和外部负荷指示器会发生变化。在男性和女性群体中，指标值的变化达到VE：分别为9％和12％，HR：0.5％和15，O2HR：分别为7％和15％，VO2：分别为14％和20％，并且发电量分别减少了5％和4％。与海平面相似的条件相比，在低氧条件下，发电功率降低了5％，通风量增加了10％，最高VO2max降低了17％，这表明有必要对训练进行修改负载。