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Athletes can minimize exercise-induced gastrointestinal (GI) issues by strategically managing carbohydrate (CHO) intake. Using multiple transportable carbohydrates and CHO mouth rinses can enhance performance and reduce GI distress during intense physical activity.

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Area of Science:

  • Sports nutrition
  • Exercise physiology
  • Gastroenterology

Background:

  • Gastrointestinal (GI) problems frequently affect athletes during intense exercise, potentially impairing performance.
  • Mechanical, ischemic, and nutritional factors contribute to exercise-induced GI distress.
  • High carbohydrate intake and hyperosmolar solutions are known nutritional triggers for GI symptoms.

Purpose of the Study:

  • To explore nutritional strategies for minimizing gastrointestinal symptoms in athletes.
  • To evaluate the efficacy of multiple transportable carbohydrates (MTCs) in managing exercise-related GI issues.
  • To investigate the role of carbohydrate (CHO) intake timing and type on athletic performance and GI comfort.

Main Methods:

  • Review of nutritional manipulations for reducing exercise-induced GI symptoms.
  • Analysis of the impact of different carbohydrate (CHO) types, doses, and concentrations on gastric emptying and absorption.
  • Examination of strategies such as multiple transportable carbohydrates (glucose-fructose), carbohydrate mouth rinses, and gut training.

Main Results:

  • Multiple transportable carbohydrates (MTCs) increase CHO oxidation rates and prevent intestinal accumulation.
  • Glucose (6%) or glucose-fructose (8%-10%) beverages aid CHO intake without delaying gastric emptying.
  • Carbohydrate mouth rinsing may enhance performance in shorter exercise durations (<1 hour) without engaging the GI tract.

Conclusions:

  • Strategic nutritional interventions, particularly with MTCs, can mitigate GI distress in athletes.
  • Optimizing CHO intake through specific beverage formulations and mouth rinses can improve performance.
  • Further research is needed to compare various CHO types, doses, and concentrations across different exercise intensities and durations.