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Carbohydrate mouth rinse improves morning high-intensity exercise performance
Neil D Clarke1, Scott Hammond1, Evangelos Kornilios1
1a Faculty of Health and Life Sciences, School of Life Sciences , Coventry University , Coventry , UK.
European Journal of Sport Science
|June 6, 2017
Summary
Oral carbohydrate (CHO) rinsing enhances morning exercise performance, improving jump height, sprint times, and repetitions to failure. This study found CHO mouth rinse significantly boosted performance metrics in healthy males after an overnight fast.
Area of Science:
- Sports Science
- Exercise Physiology
- Nutritional Biochemistry
Background:
- Oral carbohydrate (CHO) rinsing has shown benefits for exercise performance lasting up to one hour.
- The effects of CHO rinsing on morning, high-intensity exercise performance, especially after an overnight fast, require further investigation.
Purpose of the Study:
- To investigate the impact of carbohydrate (CHO) mouth rinsing on morning high-intensity exercise performance in healthy males.
- To assess the effects of CHO rinsing on specific performance metrics including countermovement jump, sprint time, and strength endurance.
Main Methods:
- Twelve healthy males participated in a controlled study involving countermovement jump (CMJ) height, 10m sprint time, and repetitions to failure for bench press and back squat.
- Participants underwent testing at 07:30 after an 11-hour overnight fast, receiving either a CHO rinse, placebo (PLA) rinse, or a control (CON) condition.
- Performance metrics and subjective measures like arousal were recorded and compared across the three conditions.
Main Results:
- Carbohydrate (CHO) mouth rinsing significantly improved countermovement jump (CMJ) height, 10m sprint times, and repetitions to failure in bench press and squat exercises.
- Mean felt arousal levels were also significantly higher following CHO rinsing compared to placebo and control conditions.
- Isometric mid-thigh pull peak force, however, remained unaffected by the CHO mouth rinse, indicating a selective enhancement of certain performance aspects.
Conclusions:
- Oral carbohydrate (CHO) rinsing effectively enhances morning high-intensity exercise performance in key metrics such as power, speed, and muscular endurance.
- The findings suggest that CHO mouth rinsing can be a practical ergogenic aid for athletes performing in the morning, particularly after a period of fasting.
- While CHO rinsing improves certain performance indicators, it does not appear to influence maximal isometric strength, highlighting the nuanced physiological responses to oral carbohydrate application.
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