Hematologic Concerns in the Athlete

Adams, William

doi:10.1201/b14245-71

Cited by 1 publication

(2 citation statements)

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“…An increase in plasma volume due to intracellular fluid transfer to the vessel and the reduction of Hb concentration are believed to lead to such anemia. Predictably, the increase in plasma volume that occurs as a result of the training is initiated 48-72 hours after the exercise (24). In the present study, iron and ferritin levels increased after 24 and 72 hours of recovery.…”

Section: Discussionsupporting

confidence: 46%

“…However, no significant changes in fibrinogen levels and high sensitivity C-reactive protein were found in active men three hours after the endurance and resistance exercise (3). Therefore, it seems that more time is needed for recovery and changes in hematological factors after the exercise, especially severe physical activity and the levels of blood factors and plasma volume re suggested to return to their initial level after 48-72 hours of acute aerobic exercise (24). Sweating is argued to be one of the cases that reduce the iron levels during intense activities and excrete between 6% and 11% of body iron (25).…”

Section: Discussionmentioning

confidence: 99%

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Effect of acute aerobic exercise in different times of day on iron status and hematological factors in professional football players

Ghahfarrokhi

Habibi

Nasab

2019

J Shahrekord Univ Med Sci

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Background and aims: Exercise time is one of the main challenges of athletes. The purpose of this study was to investigate the effect of acute aerobic exercise at different times of the day on iron status and hematological factors in professional football players. Methods: In this quasi-experimental study, 40 professional football players were randomly divided into morning exercise, evening exercise, morning control, and evening control groups. The experimental groups performed Bruce’s test in the morning and evening. To measure iron, ferritin, red blood cell (RBC), and hemoglobin (Hb), the blood samples were taken before, immediately after, as well as 24 and 72 hours after the Bruce test. Repeated-measure ANOVA and two-way ANOVA (group*time) were used to analyze the obtained data. Results: The results showed a significant increase immediately after an acute aerobic exercise while demonstrating a significant decrease in RBC and Hb in morning and evening exercise groups 24 and 72 hours after the exercise compared to the control groups. In addition, a significant reduction immediately after the acute aerobic exercise, whereas a significant increase 24 and 72 hours after the exercise, was observed in the serum levels of iron and ferritin in the morning and evening exercise groups compared to the control groups. As regards the serum levels of iron, an immediate significant decrease, along with a significant increase 24 hours after the acute aerobic exercise was found between the morning and evening exercise groups (P≤0.05). Conclusion: It seems that performing acute endurance training in the evening is safe in terms of reducing the serum levels of iron and developing the "exercise-induced anemia". Finally, at least 24 hours is required for the recovery of hematological parameters after acute endurance training.

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Section: Discussionsupporting

confidence: 46%

Section: Discussionmentioning

confidence: 99%