Effects of pre-competitional rapid weight loss on nutrition, vitamin status and oxidative stress in elite boxers

Reljic D, Jost J, Dickau K, Kinscherf R, Bonaterra G, Friedmann-Bette B (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Journal of Sports Sciences Taylor & Francis

Book Volume: 33

Pages Range: 437-448

Journal Issue: 5

DOI: 10.1080/02640414.2014.949825

Abstract

Abstract: Dietary intake, vitamin status and oxidative stress were evaluated in 17 elite male boxers. Ten of them frequently reduced body weight rapidly before competitions (Weight Loss Group) and 7 did not practice rapid weight loss (Control Group). Food record checklists, blood samples for determination of vitamin status and plasma glutathione levels were obtained during a week of weight maintenance, a pre-competition week and a post-competition week. The average dietary intakes in both groups were 33 ± 8 kcal·kg−1, 3.7 ± 1.1 g·kg−1 carbohydrates, 1.5 ± 0.4 g·kg−1 protein, 1.2 ± 0.4 g·kg−1 fat and 2.2 ± 1.0 L water per day (excluding pre-competition week in Weight Loss Group). Energy (18 ± 7 kcal·kg−1), carbohydrate (2.2 ± 0.8 g·kg−1), protein (0.8 ± 0.4 g·kg−1), fat (0.6 ± 0.3 g·kg−1) and water (1.6 ± 0.6 L) consumption (P-values <0.001) and intakes of most vitamins (P-values < 0.05) were significantly reduced during the pre-competition week in the Weight Loss Group. In both groups, the intakes of vitamins A, E and folate were below recommended values throughout the three periods; however, blood vitamin and plasma glutathione levels did not change significantly. Our findings indicate a low-caloric and low-carbohydrate diet in elite boxers, regardless of participating in rapid weight loss or not. Apparently, the pre-competitional malnutitrition in the Weight Loss Group did not induce alterations in the vitamin and glutathione status.

Involved external institutions

Philipps-Universität Marburg DE Germany (DE) Universitätsklinikum Heidelberg DE Germany (DE) Olympiastützpunkt Rhein-Neckar DE Germany (DE)

How to cite

APA:

Reljic, D., Jost, J., Dickau, K., Kinscherf, R., Bonaterra, G., & Friedmann-Bette, B. (2015). Effects of pre-competitional rapid weight loss on nutrition, vitamin status and oxidative stress in elite boxers. Journal of Sports Sciences, 33(5), 437-448. https://dx.doi.org/10.1080/02640414.2014.949825

MLA:

Reljic, Dejan, et al. "Effects of pre-competitional rapid weight loss on nutrition, vitamin status and oxidative stress in elite boxers." Journal of Sports Sciences 33.5 (2015): 437-448.

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