Kocharov A M, Britov A N, Kobal' A M, Grishenkov E A
Kardiologiia. 1992 Jun;32(6):30-1.
The relationship of physical working capacity (PWC), blood pressure and other arterial hypertension risk factors to the rate of red blood cell Na+/Li+ countertransport was examined in a representative sample comprising 60 individuals (22 males and 38 females) whose age was 35-54 years. Regression analyses demonstrated that there was no significant relationship between PWC and the rate of red blood cell Na+/Li+ countertransport, but a significant correlation was found between the rate of Na+/Li+ countertransport and "double product" (DP) as an indirect indicator of PWC and heart rate. Thus, there is a heart rate- and DP-mediated correlation between the rate of red blood cell Na+/Li+ countertransport and the level of PWC. The magnitude of a decrease in the rate of red blood cell Na+/Li+ countertransport depends inversely on the dynamics of heart rate in males and females and directly on the dynamics of DP in females. Hence, there is a direct relationship between the magnitude of a reduction in the rate of red blood cell Na+/Li+ countertransport and that of PWC increment during exercise.
在一个由60名年龄在35至54岁之间的个体（22名男性和38名女性）组成的代表性样本中，研究了体力工作能力（PWC）、血压及其他动脉高血压风险因素与红细胞钠/锂逆向转运速率之间的关系。回归分析表明，PWC与红细胞钠/锂逆向转运速率之间无显著关系，但发现钠/锂逆向转运速率与作为PWC和心率间接指标的“双乘积”（DP）之间存在显著相关性。因此，红细胞钠/锂逆向转运速率与PWC水平之间存在由心率和DP介导的相关性。男性和女性红细胞钠/锂逆向转运速率降低的幅度与心率动态呈反比，而在女性中与DP动态呈正比。因此，运动期间红细胞钠/锂逆向转运速率降低的幅度与PWC增加的幅度之间存在直接关系。
