PMID: 29997738Jul 13, 2018Paper

Carbohydrate Mouth Rinse Improves Relative Mean Power During Multiple Sprint Performance

International Journal of Exercise Science
Garet W SimpsonKelly Pritchett

Abstract

Multiple investigations have confirmed carbohydrate mouth rinse (CMR) enhances high intensity endurance performance lasting under 1 hour, but the effects of CMR on high intensity intermittent exercise has received less attention. This study examined the effect of CMR on high intensity multiple sprint performances in a protocol designed to emulate a cyclocross or mountain biking event. Seven trained men (28.2 ± 6.8 years, 185 ± 9 cm, 85.3 ± 14.8 kg, VO2peak 51.4 ± 7.3 ml/kg*min-1) completed two, 48 min high intensity intermittent cycling protocols that consisted of 6 bouts of 5 min cycling at 50% VO2 peak followed by sets of three, 10-s Wingate sprints with 50 s of recovery between sprints. Prior to each set of Wingate sprints, either a 6.4% carbohydrate solution (CMR) or placebo (PLA) were rinsed for 10 s using a counterbalanced crossover design. There was a significant main effect (CMR 10.51 ± 0.82, PLA 10.33 ± 0.87 W/kg; p < 0.05 ES=0.21) for mean power, but post hoc tests only revealed statistically significant performance improvement with CMR during the 6th bout (CMR 10.5 ± 0.75, PLA 10.22 ± 0.92 W/kg; p = 0.01 ES=0.33). No treatment effect was exhibited for peak power, fatigue index, ratings of perceived exertion, or blood...Continue Reading

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