Paulev P E, Jordal R, Pedersen N S
Clin Chim Acta. 1983 Jan 7;127(1):19-27. doi: 10.1016/0009-8981(83)90071-2.
The iron concentration in sweat and serum and related variables (transferrin saturation percentage, hemoglobin concentration) was measured in two groups of distance runners, each consisting of ten persons. In the first group unclear sweat was collected from the back of the athletes during cycling (without previous washing). The iron concentration (means +/- SEM) was 5.2 +/- 1.0 mumol/l of sweat. In the second group the sweat collection was performed similarly, but following elimination of the very first sweat from the site of collection (back) before three consecutive samples were taken. The iron concentration of the three samples was 3.6 +/- 1.1, 2.3 +/- 0.2 and 2.4 +/- 0.3 mumol/1. There was no statistically significant difference between the consecutive samples on the p less than 0.001 level. These results are in accordance with the lowest values found in the literature. There was no correlation between the iron concentration in sweat and in serum of the 20 persons. Seven of the runners had transferrin saturation percentages below 20, suggesting a possible iron deficiency. A daily loss in sweat of more than 18 mumol (1 mg) is possible in these runners training 125-350 km/week all the year round. The dominating iron loss of male endurance athletes is probably through the sweat.
对两组长跑运动员（每组十人）的汗液和血清中的铁浓度以及相关变量（转铁蛋白饱和度百分比、血红蛋白浓度）进行了测量。第一组中，在运动员骑行过程中（未事先清洗）从其背部收集未清洗的汗液。汗液中铁浓度（平均值±标准误）为5.2±1.0μmol/L。第二组的汗液收集方式类似，但在连续采集三个样本之前，先将采集部位（背部）最初排出的汗液去除。这三个样本的铁浓度分别为3.6±1.1、2.3±0.2和2.4±0.3μmol/L。在p<0.001水平上，连续样本之间无统计学显著差异。这些结果与文献中发现的最低值一致。20名受试者汗液和血清中的铁浓度之间无相关性。七名跑步者的转铁蛋白饱和度百分比低于20%，提示可能存在缺铁。对于这些全年每周训练125 - 350公里的跑步者来说，汗液中每天铁流失超过18μmol（1mg）是可能的。男性耐力运动员主要的铁流失途径可能是通过汗液。
