[Reduction of iron deposits after physical exercise of short-duration]

Abstract

Purpose: To study iron metabolism in young people subjected to short-term physical exertion.

Material and methods: Haemoglobin rate, plasma iron, total iron binding capacity and haptoglobin were assessed before, during and fifteen days after seven-day intensive exertions (military drill) in 38 cadets of the General Military Academy at Zaragoza, at sea-level altitude. The type and intensity of the exercises and the diet were similar for all the subjects. Mean and standard deviation of all values were calculated; the differences were studied by paired t test and p < 0.005 was fixed to allow statistical differences.

Results: Decreased serum ferritin, which probably means diminished iron deposits, was found after exertions. Haemolysis is not likely involved since the haptoglobin rates were not decreased below the security limits which avoid haemoglobinuria.

Conclusions: Physical exercise, although of short duration, may lessen iron deposits, although not to the extent of iron-lack erythropoiesis.