PMID- 21336838 OWN - NLM STAT- MEDLINE DCOM- 20120104 LR - 20211020 IS - 1439-6327 (Electronic) IS - 1439-6319 (Linking) VI - 111 IP - 9 DP - 2011 Sep TI - The effect of carbohydrate mouth rinse on maximal strength and strength endurance. PG - 2381-6 LID - 10.1007/s00421-011-1865-8 [doi] AB - It has been previously reported that carbohydrate (CHO) mouth rinse can improve exercise performance. The proposed mechanism involves increased activation of brain regions believed to be responsible for reward/motivation and motor control. Since strength-related performance is affected by central drive to the muscles, it seems reasonable to hypothesize that the positive CNS response to oral CHO sensing may counteract the inhibitory input from the muscle afferent pathways minimizing the drop in the central drive. The purpose of the current study was to test if CHO mouth rinse affects maximum strength and strength endurance performance. Twelve recreationally strength-trained healthy males (age 24.08 +/- 2.99 years; height 178.09 +/- 6.70 cm; weight 78.67 +/- 8.17 kg) took part in the study. All of the tests were performed in the morning, after an 8 h overnight fasting. Subjects were submitted to a maximum strength test (1-RM) and a strength endurance test (six sets until failure at 70% of 1-RM), in separate days under three different experimental conditions (CHO mouth rinse, placebo-PLA mouth rinse and control-CON) in a randomized crossover design. The CHO mouth rinse (25 ml) occurred before every attempt in the 1-RM test, and before every set in the endurance strength test. Blood glucose and lactate were measured immediately before and 5 min post-tests. There were no significant differences in 1-RM between experimental conditions (CHO 101 +/- 7.2 kg; PLA 101 +/- 7.4 kg; CON 101 +/- 7.2 kg; p = 0.98). Furthermore, there were no significance between trial differences in the number of repetitions performed in each set (p = 0.99) or the total exercise volume (number of repetitions x load lifted [kg]) (p = 0.98). A main effect for time (p < 0.0001) in blood lactate concentration was observed in both tests (1-RM and strength endurance). Blood glucose concentration did not differ between conditions. In conclusion, CHO mouth rinse does not affect maximum strength or strength endurance performance. FAU - Painelli, Vitor S AU - Painelli VS AD - Laboratory of Applied Nutrition and Metabolism, Department of Biodynamics of Human Movement, School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil. FAU - Roschel, Hamilton AU - Roschel H FAU - Gualano, Bruno AU - Gualano B FAU - Del-Favero, Serena AU - Del-Favero S FAU - Benatti, Fabiana B AU - Benatti FB FAU - Ugrinowitsch, Carlos AU - Ugrinowitsch C FAU - Tricoli, Valmor AU - Tricoli V FAU - Lancha, Antonio H Jr AU - Lancha AH Jr LA - eng PT - Journal Article PT - Randomized Controlled Trial PT - Research Support, Non-U.S. Gov't DEP - 20110219 PL - Germany TA - Eur J Appl Physiol JT - European journal of applied physiology JID - 100954790 RN - 0 (Blood Glucose) RN - 0 (Dietary Carbohydrates) RN - 0 (Mouthwashes) RN - 0 (Placebos) RN - 33X04XA5AT (Lactic Acid) SB - IM MH - Adult MH - Blood Glucose/analysis/drug effects MH - Cross-Over Studies MH - Dietary Carbohydrates/administration & dosage/*pharmacology MH - Double-Blind Method MH - Exercise Test MH - Humans MH - Lactic Acid/blood MH - Male MH - Mouth/*drug effects MH - Mouthwashes/*pharmacology MH - Muscle Strength/*drug effects/physiology MH - Physical Endurance/*drug effects/physiology MH - Placebos MH - *Resistance Training MH - Young Adult EDAT- 2011/02/22 06:00 MHDA- 2012/01/05 06:00 CRDT- 2011/02/22 06:00 PHST- 2010/08/30 00:00 [received] PHST- 2011/02/03 00:00 [accepted] PHST- 2011/02/22 06:00 [entrez] PHST- 2011/02/22 06:00 [pubmed] PHST- 2012/01/05 06:00 [medline] AID - 10.1007/s00421-011-1865-8 [doi] PST - ppublish SO - Eur J Appl Physiol. 2011 Sep;111(9):2381-6. doi: 10.1007/s00421-011-1865-8. Epub 2011 Feb 19.