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Original Research

Open Access Special Issue

Effects of natural iron supplement intake on EPO, Hp, and iron metabolism during rapid weight loss in university wrestlers

  • Jun-Young Sung1,†,
  • Tea-Woong Oh2,*,†,
  • Soon-Gil Lim3

1Department of Aero Fitness, Republic of Korea Air Force Academy, 28187 Chungcheongbuk-do, Republic of Korea

2Department of Sports Leisure, YongIn University, 17092 Gyeonggi do, Republic of Korea

3Department of Physical Education, YongIn University, 17092 Gyeonggi do, Republic of Korea

DOI: 10.31083/j.jomh1805114 Vol.18,Issue 5,May 2022 pp.1-8

Submitted: 11 November 2021 Accepted: 22 December 2021

Published: 31 May 2022

(This article belongs to the Special Issue Weight maintenance in men)

*Corresponding Author(s): Tea-Woong Oh E-mail: Ohtw1972@gmail.com

† These authors contributed equally.

Abstract

Background: The purpose of this study was to determine the changes in erythropoiesis and iron metabolism indicators in order to improve the maintenance of athletic performance during rapid weight loss. Methods: The subjects were 23 university wrestlers (13 male, 10 female). The first measurements in the male and female groups after natural iron supplement intake indicated weight decreases of 6.2% and 5.8%, respectively. After the 3-week washout period, the weights in the male and female groups decreased by 6.1% and 6.2%, respectively. Results: Males in the intake group experienced changes in iron metabolism after weight loss, as shown by increases in the iron indicators (Fe, p < 0.041; transferrin, p < 0.004; total iron binding Capacity (TIBC), p < 0.031), whereas the female group showed no significant changes. Both groups experienced decreases in erythropoietin (males, p < 0.021; females, p < 0.027) and VO22max (p <0.001) after weight loss. Blood lactate in the intake group decreased after maximal exercise immediately after the test for the male group (p <0.031) and during resting time and immediately after exercise in the female group (p < 0.001 and p < 0.050, respectively). Conclisions: These findings suggest that a 7% loss in weight does not positively affect athletic ability. Further research on methods for iron supplement intake, weight loss, and training is necessary to confirm our conclusions.


Keywords

rapid weight loss; athlete nutrition; exercise performance; iron supplements


Cite and Share

Jun-Young Sung,Tea-Woong Oh,Soon-Gil Lim. Effects of natural iron supplement intake on EPO, Hp, and iron metabolism during rapid weight loss in university wrestlers. Journal of Men's Health. 2022. 18(5);1-8.

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