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Anaerobic performance when rehydrating with water or commercially available sports drinks during prolonged exercise in the heat.
Appl Physiol Nutr Metab. 2008 Apr; 33(2):290-8.AP

Abstract

The effects that rehydrating drinks ingested during exercise may have on anaerobic exercise performance are unclear. This study aimed to determine which of four commercial rehydrating drinks better maintains leg power and force during prolonged cycling in the heat. Seven endurance-trained and heat-acclimatized cyclists pedaled for 120 min at 63% maximum oxygen consumption in a hot, dry environment (36 degrees C; 29% humidity, 1.9 m.s-1 airflow). In five randomized trials, during exercise, subjects drank 2.4 +/- 0.1 L of (i) mineral water (WAT; San Benedetto), (ii) 6% carbohydrate-electrolyte solution (Gatorade lemon), (iii) 8% carbohydrate-electrolyte solution (Powerade Citrus Charge), (iv) 8% carbohydrate-electrolyte solution with lower sodium concentration than other sports drinks (Aquarius orange), or (v) did not ingest any fluid (DEH). Fluid balance, rectal temperature (Trec), maximal cycling power (Pmax), and leg maximal voluntary isometric contraction (MVC) were measured. During DEH, subjects lost 3.7 +/- 0.2% of initial body mass, whereas subjects lost only 0.8% +/- 0.1% in the other trials (p < 0.05). Final Trec was higher in DEH than in the rest of the trials (39.4 +/- 0.1 degrees C vs. 38.7 +/- 0.1 degrees C; p < 0.05). Pmax was similar among all trials. Gatorade and Powerade preserved MVC better than DEH (-3.1% +/- 2% and -3.8% +/- 2% vs. -11% +/- 2%, p < 0.05), respectively, whereas WAT and Aquarius did not (-6% +/- 2%). Compared with DEH, rehydration with commercially available sports drinks during prolonged exercise in the heat preserves leg force, whereas rehydrating with water does not. However, low sodium concentration in a sports drink seems to preclude its ergogenic effects on force.

Authors+Show Affiliations

Universidad de Castilla-La Mancha, Toledo, Spain.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18347684

Citation

Coso, Juan Del, et al. "Anaerobic Performance when Rehydrating With Water or Commercially Available Sports Drinks During Prolonged Exercise in the Heat." Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquee, Nutrition Et Metabolisme, vol. 33, no. 2, 2008, pp. 290-8.
Coso JD, Estevez E, Baquero RA, et al. Anaerobic performance when rehydrating with water or commercially available sports drinks during prolonged exercise in the heat. Appl Physiol Nutr Metab. 2008;33(2):290-8.
Coso, J. D., Estevez, E., Baquero, R. A., & Mora-Rodriguez, R. (2008). Anaerobic performance when rehydrating with water or commercially available sports drinks during prolonged exercise in the heat. Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquee, Nutrition Et Metabolisme, 33(2), 290-8. https://doi.org/10.1139/H07-188
Coso JD, et al. Anaerobic Performance when Rehydrating With Water or Commercially Available Sports Drinks During Prolonged Exercise in the Heat. Appl Physiol Nutr Metab. 2008;33(2):290-8. PubMed PMID: 18347684.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Anaerobic performance when rehydrating with water or commercially available sports drinks during prolonged exercise in the heat. AU - Coso,Juan Del, AU - Estevez,Emma, AU - Baquero,Raúl Antonio, AU - Mora-Rodriguez,Ricardo, PY - 2008/3/19/pubmed PY - 2008/8/30/medline PY - 2008/3/19/entrez SP - 290 EP - 8 JF - Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme JO - Appl Physiol Nutr Metab VL - 33 IS - 2 N2 - The effects that rehydrating drinks ingested during exercise may have on anaerobic exercise performance are unclear. This study aimed to determine which of four commercial rehydrating drinks better maintains leg power and force during prolonged cycling in the heat. Seven endurance-trained and heat-acclimatized cyclists pedaled for 120 min at 63% maximum oxygen consumption in a hot, dry environment (36 degrees C; 29% humidity, 1.9 m.s-1 airflow). In five randomized trials, during exercise, subjects drank 2.4 +/- 0.1 L of (i) mineral water (WAT; San Benedetto), (ii) 6% carbohydrate-electrolyte solution (Gatorade lemon), (iii) 8% carbohydrate-electrolyte solution (Powerade Citrus Charge), (iv) 8% carbohydrate-electrolyte solution with lower sodium concentration than other sports drinks (Aquarius orange), or (v) did not ingest any fluid (DEH). Fluid balance, rectal temperature (Trec), maximal cycling power (Pmax), and leg maximal voluntary isometric contraction (MVC) were measured. During DEH, subjects lost 3.7 +/- 0.2% of initial body mass, whereas subjects lost only 0.8% +/- 0.1% in the other trials (p < 0.05). Final Trec was higher in DEH than in the rest of the trials (39.4 +/- 0.1 degrees C vs. 38.7 +/- 0.1 degrees C; p < 0.05). Pmax was similar among all trials. Gatorade and Powerade preserved MVC better than DEH (-3.1% +/- 2% and -3.8% +/- 2% vs. -11% +/- 2%, p < 0.05), respectively, whereas WAT and Aquarius did not (-6% +/- 2%). Compared with DEH, rehydration with commercially available sports drinks during prolonged exercise in the heat preserves leg force, whereas rehydrating with water does not. However, low sodium concentration in a sports drink seems to preclude its ergogenic effects on force. SN - 1715-5312 UR - https://www.unboundmedicine.com/medline/citation/18347684/Anaerobic_performance_when_rehydrating_with_water_or_commercially_available_sports_drinks_during_prolonged_exercise_in_the_heat_ L2 - http://www.nrcresearchpress.com/doi/full/10.1139/H07-188?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -