Effects of glycerol and creatine hyperhydration on doping-relevant blood parameters

Thelma P. Polyviou, Chris Easton, Lukas Beis, Dalia Malkova, Pantazis Takas, Catherine Hambly, John R. Speakman, Karsten Koehler, Yannis P. Pitsiladis

Research output: Contribution to journalArticle

Abstract

Glycerol is prohibited as an ergogenic aid by the World Anti-Doping Agency (WADA) due to the potential for its plasma expansion properties to have masking effects. However, the scientific basis of the inclusion of Gly as a "masking agent" remains inconclusive. The purpose of this study was to determine the effects of a hyperhydrating supplement containing Gly on doping-relevant blood parameters. Nine trained males ingested a hyperhydrating mixture twice per day for 7 days containing 1.0 g.kg(-1) body mass (BM) of Gly, 10.0 g of creatine and 75.0 g of glucose. Blood samples were collected and total hemoglobin (Hb) mass determined using the optimized carbon monoxide (CO) rebreathing method pre- and post-supplementation. BM and total body water (TBW) increased significantly following supplementation by 1.1 +/- 1.2 and 1.0 +/- 1.2 L (BM, P < 0.01; TBW, P < 0.01), respectively. This hyperhydration did not significantly alter plasma volume or any of the doping-relevant blood parameters (e. g., hematocrit, Hb, reticulocytes and total Hb-mass) even when Gly was clearly detectable in urine samples. In conclusion, this study shows that supplementation with hyperhydrating solution containing Gly for 7 days does not significantly alter doping-relevant blood parameters.
Original languageEnglish
Pages (from-to)1171-1186
Number of pages16
JournalNutrients
Volume4
Issue number9
DOIs
Publication statusPublished - Aug 2012
Externally publishedYes

Keywords

  • masking agent
  • glycerol
  • creatine
  • hyperhydration
  • doping markers

Cite this

Polyviou, T. P., Easton, C., Beis, L., Malkova, D., Takas, P., Hambly, C., ... Pitsiladis, Y. P. (2012). Effects of glycerol and creatine hyperhydration on doping-relevant blood parameters. Nutrients, 4(9), 1171-1186. https://doi.org/10.3390/nu4091171
Polyviou, Thelma P. ; Easton, Chris ; Beis, Lukas ; Malkova, Dalia ; Takas, Pantazis ; Hambly, Catherine ; Speakman, John R. ; Koehler, Karsten ; Pitsiladis, Yannis P. / Effects of glycerol and creatine hyperhydration on doping-relevant blood parameters. In: Nutrients. 2012 ; Vol. 4, No. 9. pp. 1171-1186.
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Polyviou, TP, Easton, C, Beis, L, Malkova, D, Takas, P, Hambly, C, Speakman, JR, Koehler, K & Pitsiladis, YP 2012, 'Effects of glycerol and creatine hyperhydration on doping-relevant blood parameters' Nutrients, vol. 4, no. 9, pp. 1171-1186. https://doi.org/10.3390/nu4091171

Effects of glycerol and creatine hyperhydration on doping-relevant blood parameters. / Polyviou, Thelma P.; Easton, Chris; Beis, Lukas; Malkova, Dalia; Takas, Pantazis; Hambly, Catherine; Speakman, John R.; Koehler, Karsten; Pitsiladis, Yannis P.

In: Nutrients, Vol. 4, No. 9, 08.2012, p. 1171-1186.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of glycerol and creatine hyperhydration on doping-relevant blood parameters

AU - Polyviou, Thelma P.

AU - Easton, Chris

AU - Beis, Lukas

AU - Malkova, Dalia

AU - Takas, Pantazis

AU - Hambly, Catherine

AU - Speakman, John R.

AU - Koehler, Karsten

AU - Pitsiladis, Yannis P.

PY - 2012/8

Y1 - 2012/8

N2 - Glycerol is prohibited as an ergogenic aid by the World Anti-Doping Agency (WADA) due to the potential for its plasma expansion properties to have masking effects. However, the scientific basis of the inclusion of Gly as a "masking agent" remains inconclusive. The purpose of this study was to determine the effects of a hyperhydrating supplement containing Gly on doping-relevant blood parameters. Nine trained males ingested a hyperhydrating mixture twice per day for 7 days containing 1.0 g.kg(-1) body mass (BM) of Gly, 10.0 g of creatine and 75.0 g of glucose. Blood samples were collected and total hemoglobin (Hb) mass determined using the optimized carbon monoxide (CO) rebreathing method pre- and post-supplementation. BM and total body water (TBW) increased significantly following supplementation by 1.1 +/- 1.2 and 1.0 +/- 1.2 L (BM, P < 0.01; TBW, P < 0.01), respectively. This hyperhydration did not significantly alter plasma volume or any of the doping-relevant blood parameters (e. g., hematocrit, Hb, reticulocytes and total Hb-mass) even when Gly was clearly detectable in urine samples. In conclusion, this study shows that supplementation with hyperhydrating solution containing Gly for 7 days does not significantly alter doping-relevant blood parameters.

AB - Glycerol is prohibited as an ergogenic aid by the World Anti-Doping Agency (WADA) due to the potential for its plasma expansion properties to have masking effects. However, the scientific basis of the inclusion of Gly as a "masking agent" remains inconclusive. The purpose of this study was to determine the effects of a hyperhydrating supplement containing Gly on doping-relevant blood parameters. Nine trained males ingested a hyperhydrating mixture twice per day for 7 days containing 1.0 g.kg(-1) body mass (BM) of Gly, 10.0 g of creatine and 75.0 g of glucose. Blood samples were collected and total hemoglobin (Hb) mass determined using the optimized carbon monoxide (CO) rebreathing method pre- and post-supplementation. BM and total body water (TBW) increased significantly following supplementation by 1.1 +/- 1.2 and 1.0 +/- 1.2 L (BM, P < 0.01; TBW, P < 0.01), respectively. This hyperhydration did not significantly alter plasma volume or any of the doping-relevant blood parameters (e. g., hematocrit, Hb, reticulocytes and total Hb-mass) even when Gly was clearly detectable in urine samples. In conclusion, this study shows that supplementation with hyperhydrating solution containing Gly for 7 days does not significantly alter doping-relevant blood parameters.

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KW - glycerol

KW - creatine

KW - hyperhydration

KW - doping markers

U2 - 10.3390/nu4091171

DO - 10.3390/nu4091171

M3 - Article

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SP - 1171

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JO - Nutrients

JF - Nutrients

SN - 2072-6643

IS - 9

ER -