Ventilatory threshold is one of the ways to measure cardiovasculatory fitness of the body. Therefore, in the present study it was decided to demonstrate which physiological parameters most accurately express the second ventilatory threshold (VAT2) depending on the cardiovasculatory fitness of different groups of athletes and untrained men. The study involved the following athletes: race walkers (n=14), weightlifters (n=16), powerlifters (n=16), runners (n=14), professional soccer players (n=13), amateur soccer players (n=16), martial arts (n=12), and untrained men (n=15). Subjects’ VAT2 and maximal load (ML) were recorded and at these levels were determined the value of achievable maximal power (P), oxygen uptake (VO2), heart rate (HR), the ratio for oxygen uptake and heart rate (VO2/HR) and the rate-pressure produkt (RPP). It was shown that subjects were of similar age but different body mass (BM) and BMI. There were also differences between athlete groups at VAT2 and ML in relation to: P, VO2, VO2/HR (p<0.001) and RPP only at VAT2 (p<0.023). Reached HR values at VAT2 as well as at ML have not differed between the groups. There were also intergroup differences at VAT2 in terms of relative values: %VO2max (p<0.002), %Pmax(p<0.016), %VO2max/%HRmax (p<0.03). Relatively expressed %HRmax and %RPPmax reached at VAT2 did not differ between the two groups. Runners, professional soccer players and race walkers achieved the most favorable indicators of physical performance. It has been demonstrated that VAT2 besides P i %Pmax was best described by VO2, %VO2max and by VO2/HR and %VO2max/%HRmax, as well as by RPP. On the other hand HR and %HRmax, as well as %RPPmax are not useful in this regard. Furthermore it should be recognized that athletes in whose structure of the training occurred running of varying intensity achieved the highest physical fitness.

中文翻译：

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描述专业运动中的呼吸阈值的方法

通气阈值是测量人体心血管适应性的方法之一。因此，在本研究中，决定证明哪些生理参数最能准确地表达第二通气阈值（VAT2），具体取决于不同组的运动员和未经训练的男性的心血管血管适应性。该研究涉及以下运动员：竞走助跑器（n = 14），举重运动员（n = 16），举重运动员（n = 16），跑步者（n = 14），职业足球运动员（n = 13），业余足球运动员（n = 16），武术（n = 12）和未经训练的人（n = 15）。记录受试者的VAT2和最大负荷（ML），并在这些水平下确定可达到的最大功率（P），摄氧量（VO2），心率（HR），摄氧量和心率的比值（VO2 / HR）和速率压力产品（RPP）。结果表明，受试者年龄相似，但体重（BMI）和BMI不同。在VAT2和ML的运动员组之间也存在以下差异：P，VO2，VO2 / HR（p <0.001）和仅在VAT2的RPP（p <0.023）。两组之间在VAT2和ML处达到的HR值没有差异。在VAT2的相对值上也存在组间差异：％VO2max（p <0.002），％Pmax（p <0.016），％VO2max /％HRmax（p <0.03）。两组之间达到的相对表达的％HRmax和％RPPmax没有差异。跑步者，职业足球运动员和竞走者获得了最有利的身体表现指标。已经证明，除P i％Pmax外，VAT2最好用VO2，％VO2max，VO2 / HR和％VO2max /％HRmax以及RPP来描述。另一方面，HR和％HRmax，以及％RPPmax在这方面都没有用。此外，应该认识到，在其训练结构中发生强度不同的跑步的运动员获得了最高的体能。