Haugen H, Akesson I, Strømme S B, Refsum H E
Scand J Clin Lab Invest. 1980 Oct;40(6):545-9. doi: 10.3109/00365518009091962.
Excretion of uromucoid, albumin and casts in urine were determined in twenty well-trained men, ten aged 20-30 years, and ten aged 50-60 years, before, during and after a 70 km cross country ski race. During the race there was only a slight increase in uromucoid excretion, but a marked increase in the excretion of casts and albumin. The older subjects had a tendency to lower urine output during the race compared to the younger group. Reduction of urine output below ca. 25 ml/h was accompanied by a conspicuous increase in urine cast and albumin concentrations, with only a slight increase in uromucoid concentration, and even a reduction in uromucoid excretion. No significant relationship was found between cast excretion and uromucoid concentration. Thus the gross cylindruria observed during longstanding exercise must be ascribed to other urinary factors facilitating the formation of casts.
在20名训练有素的男性中，测定了70公里越野滑雪比赛前、比赛期间和比赛后的尿类黏蛋白、白蛋白和管型的尿排泄量。其中10名年龄在20 - 30岁，另外10名年龄在50 - 60岁。比赛期间，尿类黏蛋白排泄量仅略有增加，但管型和白蛋白的排泄量显著增加。与较年轻组相比，年龄较大的受试者在比赛期间尿量有减少的趋势。尿量降至约25毫升/小时以下时，尿中管型和白蛋白浓度显著增加，而尿类黏蛋白浓度仅略有增加，甚至尿类黏蛋白排泄量减少。未发现管型排泄与尿类黏蛋白浓度之间存在显著关系。因此，长期运动期间观察到的大量管型尿必定归因于其他促进管型形成的尿液因素。
