Malczewska J, Błach W, Stupnicki R
Department of Nutrition Physiology, Institute of Sport, Warsaw, Poland.
Int J Sports Med. 2000 Apr;21(3):175-9. doi: 10.1055/s-2000-299.
The aim of the study was to assess the effect of physical exercise on the changes in concentrations of ferritin and soluble transferrin receptor (sTfR) in plasma in course of 10 consecutive days of a training camp. Ten female elite judoists, aged 17-23 years, participated in the study. Mean concentration of ferritin for the 10 day period was 62.8 x 1.633(+/-1) microg/l, the within-subject, day-to-day variability being very high (13-75%). Ferritin concentrations were significantly correlated with the training load on the preceding day (r = 0.397; p < 0.001). Mean level of sTfR was 2.56 x 1.291(+/-1) mg/l and its within-subject variability was much lower (4-16%). Although the training loads had an effect on the intravascular hemolysis as indicated by a significant, negative correlation between load scores and haptoglobin concentration (r = -0.282; p < 0.01), the latter was not correlated significantly with sTfR levels. It was concluded that the soluble transferrin receptor is a more stable indicator of iron status under high training loads since, unlike ferritin, it does not respond to the workload on the preceding day. Moreover, the intravascular hemolysis observed in athletes does not affect the sTfR levels in plasma.
本研究的目的是评估在连续10天的训练营期间体育锻炼对血浆中铁蛋白和可溶性转铁蛋白受体（sTfR）浓度变化的影响。10名年龄在17 - 23岁的女子精英柔道运动员参与了该研究。10天期间铁蛋白的平均浓度为62.8×1.633（±1）μg/l，受试者内的每日变异性非常高（13 - 75%）。铁蛋白浓度与前一天的训练负荷显著相关（r = 0.397；p < 0.001）。sTfR的平均水平为2.56×1.291（±1）mg/l，其受试者内变异性要低得多（4 - 16%）。尽管训练负荷对血管内溶血有影响，负荷评分与触珠蛋白浓度之间存在显著的负相关（r = -0.282；p < 0.01），但后者与sTfR水平无显著相关性。得出的结论是，可溶性转铁蛋白受体是高训练负荷下铁状态更稳定的指标，因为与铁蛋白不同，它对前一天的工作量没有反应。此外，运动员中观察到的血管内溶血不会影响血浆中的sTfR水平。
