[The effects of fitness-type exercise on iron status and hematological status for female college students].
Forty-two female college students underwent fitness-type exercise over a 13 week period. The students exercised an average of two times a week for 30 minute periods at 50% levels of VO2 . max. Iron status and hematological laboratory data were monitored at three points in time; at the initiation of exercise, at the termination of exercise and 3 months later. Serum ferritin levels in a third of the students were lower than 12ng/ml. Red blood cell counts decreased during exercise, and returned to the pre-exercise levels 3 months later. The number of circulatory reticulocytes and mean corpuscular hemoglobin concentration were increased significantly after the exercise and the effects were still observed 3 months later, independent of the iron status. In the lower ferritin group, erythropoietin levels decreased significantly during the post-exercise period. The average serum ferritin levels while showing no significant changes during exercise, increased significantly during the post-exercise period, in the normal ferritin group. We discussed possible mechanisms, among them iron metabolism, by which physical training may facilitate erythropoiesis. However, no definite conclusions have been reached.
D000328:Adult; D004920:Erythropoiesis; D004921:Erythropoietin / Q000097:blood; D015444:Exercise / Q000502:physiology*; D005260:Female; D005293:Ferritins / Q000097:blood*; D006403:Hematologic Tests; D006801:Humans; D010809:Physical Fitness / Q000502:physiology*
D004921:Erythropoietin; D005293:Ferritins