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01.09.2014 | Original Contribution

Short-term creatine supplementation does not reduce increased homocysteine concentration induced by acute exercise in humans

verfasst von: Rafael Deminice, Flávia Troncon Rosa, Gabriel Silveira Franco, Selma Freirede Carvalho da Cunha, Ellen Cristini de Freitas, Alceu Afonso Jordao

Erschienen in: European Journal of Nutrition | Ausgabe 6/2014

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Abstract

Purpose

The purpose of the study is to evaluate the effects of creatine supplementation on homocysteine (Hcy) plasma levels after acute exercise in humans.

Methods

Twenty-three young (under-20) soccer players were divided into 2 groups: creatine (Cr)- and placebo (Pla)-supplemented groups. The supplementation was performed in double-blind controlled manner using creatine or placebo tablets with 0.3 g/kg during 7 days. Before and after 7 days of supplementation, the athletes performed an acute high-intensity sprint exercise (two consecutive running-based anaerobic sprint test protocol consisted in 6 × 35 m sprint with 10 s between them). Blood samples were collected before and after 7 days of supplementation as well as 0 and 1 h after exercise protocol.

Results

Homocysteine concentration significant increased (P < 0.05) 1 h after acute exercise (18 %). Acute exercise also decreased red blood cell S-adenosylmethionine (SAM) 30 % with no changes in SAM/SAH ratio. Seven days of creatine supplementation were able to increase (P < 0.05) plasma creatine concentration (Pla 130.1 ± 21.7 vs Cr 1,557.2 ± 220.3 μmol/L) as well as decrease (P < 0.05) plasma guanidinoacetic acid (33 %). Controversially, creatine supplementation did not change Hcy plasma level after 7-day supplementation (Pla 6.9 ± 0.2 vs Cr 7.2 ± 0.2 μmol/L) or after acute exercise (Pla 8.2 ± 0.3 vs Cr 8.4 ± 0.3 μmol/L). No changes in plasma vitamin B12 and folate as well as cysteine and methionine were found.

Conclusions

Seven days of creatine supplementation does not avoid increased plasma Hcy induced by acute sprint exercise in humans.

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Titel: Short-term creatine supplementation does not reduce increased homocysteine concentration induced by acute exercise in humans
verfasst von: Rafael Deminice
Flávia Troncon Rosa
Gabriel Silveira Franco
Selma Freirede Carvalho da Cunha
Ellen Cristini de Freitas
Alceu Afonso Jordao
Publikationsdatum: 01.09.2014
Verlag: Springer Berlin Heidelberg
Erschienen in: European Journal of Nutrition / Ausgabe 6/2014
Print ISSN: 1436-6207
Elektronische ISSN: 1436-6215
DOI: https://doi.org/10.1007/s00394-013-0636-1

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Short-term creatine supplementation does not reduce increased homocysteine concentration induced by acute exercise in humans