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Postexercise rehydration in man: the effects of carbohydrate content and osmolality of drinks ingested ad libitum.
Appl Physiol Nutr Metab. 2009 Aug; 34(4):785-93.AP

Abstract

The effectiveness of different carbohydrate solutions in restoring fluid balance in situations of voluntary fluid intake has not been examined previously. The effect of the carbohydrate content of drinks ingested after exercise was examined in 6 males and 3 females previously dehydrated by 1.99 +/- 0.07% of body mass via intermittent exercise in the heat. Beginning 30 min after the cessation of exercise, subjects drank ad libitum for a period of 120 min. Drinks contained 31 mmol.L-1 Na+ as NaCl and either 0%, 2%, or 10% glucose with mean +/- SD osmolalities of 74 +/- 1, 188 +/- 3, and 654 +/- 4 mosm.kg-1, respectively. Blood and urine samples were collected before and after exercise, midway through rehydration, and throughout a 5 h recovery period. Total fluid intake was not different among trials (0%: 2258 +/- 519 mL; 2%: 2539 +/- 436 mL; 10%: 2173 +/- 252 mL; p = 0.173). Urine output was also not different among trials (p = 0.160). No differences among trials were observed in net fluid balance or in the fraction of the ingested drink retained. In conclusion, in situations of voluntary fluid intake, hypertonic carbohydrate-electrolyte solutions are as effective as hypotonic carbohydrate-electrolyte solutions at restoring whole-body fluid balance.

Authors+Show Affiliations

Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

19767815

Citation

Evans, Gethin H., et al. "Postexercise Rehydration in Man: the Effects of Carbohydrate Content and Osmolality of Drinks Ingested Ad Libitum." Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquee, Nutrition Et Metabolisme, vol. 34, no. 4, 2009, pp. 785-93.
Evans GH, Shirreffs SM, Maughan RJ. Postexercise rehydration in man: the effects of carbohydrate content and osmolality of drinks ingested ad libitum. Appl Physiol Nutr Metab. 2009;34(4):785-93.
Evans, G. H., Shirreffs, S. M., & Maughan, R. J. (2009). Postexercise rehydration in man: the effects of carbohydrate content and osmolality of drinks ingested ad libitum. Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquee, Nutrition Et Metabolisme, 34(4), 785-93. https://doi.org/10.1139/H09-065
Evans GH, Shirreffs SM, Maughan RJ. Postexercise Rehydration in Man: the Effects of Carbohydrate Content and Osmolality of Drinks Ingested Ad Libitum. Appl Physiol Nutr Metab. 2009;34(4):785-93. PubMed PMID: 19767815.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Postexercise rehydration in man: the effects of carbohydrate content and osmolality of drinks ingested ad libitum. AU - Evans,Gethin H, AU - Shirreffs,Susan M, AU - Maughan,Ronald J, PY - 2009/9/22/entrez PY - 2009/9/22/pubmed PY - 2009/10/16/medline SP - 785 EP - 93 JF - Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme JO - Appl Physiol Nutr Metab VL - 34 IS - 4 N2 - The effectiveness of different carbohydrate solutions in restoring fluid balance in situations of voluntary fluid intake has not been examined previously. The effect of the carbohydrate content of drinks ingested after exercise was examined in 6 males and 3 females previously dehydrated by 1.99 +/- 0.07% of body mass via intermittent exercise in the heat. Beginning 30 min after the cessation of exercise, subjects drank ad libitum for a period of 120 min. Drinks contained 31 mmol.L-1 Na+ as NaCl and either 0%, 2%, or 10% glucose with mean +/- SD osmolalities of 74 +/- 1, 188 +/- 3, and 654 +/- 4 mosm.kg-1, respectively. Blood and urine samples were collected before and after exercise, midway through rehydration, and throughout a 5 h recovery period. Total fluid intake was not different among trials (0%: 2258 +/- 519 mL; 2%: 2539 +/- 436 mL; 10%: 2173 +/- 252 mL; p = 0.173). Urine output was also not different among trials (p = 0.160). No differences among trials were observed in net fluid balance or in the fraction of the ingested drink retained. In conclusion, in situations of voluntary fluid intake, hypertonic carbohydrate-electrolyte solutions are as effective as hypotonic carbohydrate-electrolyte solutions at restoring whole-body fluid balance. SN - 1715-5312 UR - https://www.unboundmedicine.com/medline/citation/19767815/Postexercise_rehydration_in_man:_the_effects_of_carbohydrate_content_and_osmolality_of_drinks_ingested_ad_libitum_ L2 - https://cdnsciencepub.com/doi/10.1139/H09-065?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -