GLOSSARY

Gastrointestinal Comfort is perceived digestive comfort, supporting practical fueling without substantial discomfort in sport.

Bloating, nausea and bowel changes have multiple causes; one meal does not establish a disease or enzyme deficiency. Record foods, amounts, timing, exercise and medicines. Severe or persistent pain, bleeding, repeated vomiting or unintended weight loss warrants assessment. Digestive discomfort should not automatically trigger enzyme supplements or unsupervised exclusion of an entire food group, especially when the athlete already struggles to meet energy needs.

Exercise intensity, heat, mechanical movement, splanchnic blood flow and fueling choices can influence gut symptoms. Gradually practicing eating and drinking helps characterize and sometimes improve tolerance. Severe symptoms are not a training target. Repeated discomfort requires review of multiple factors rather than automatically blaming gluten, lactose or one transporter. An individualized plan should support both fuel delivery and comfort without unnecessary restriction of the wider diet.

Food intolerance concerns symptoms after intake and is not necessarily immune allergy. Dose, meal context, fructose, polyols and individual circumstances matter. Fructose malabsorption differs from hereditary fructose intolerance. Records and targeted changes with reassessment are preferable to long forbidden-food lists. Necessary exclusions should include planned energy and nutrient replacements, especially in athletes who use concentrated carbohydrate products or already have restricted eating patterns.

The large intestine recovers remaining water and electrolytes, stores contents and supports elimination. Microbes ferment some nondigestible carbohydrates; fibers differ in behavior. Much nutrient uptake has already occurred in the small intestine. Adjust pre-event fiber to tolerance rather than using colonic fermentation as a reason to permanently exclude whole grains and legumes. Short-term competition convenience and long-term dietary quality serve different purposes.

Gastric emptying moves contents into the duodenum, responding to volume, physical form, energy and intestinal feedback. Fat and meal composition modify the process; no exact time fits all foods. Faster emptying does not necessarily mean greater absorption or better tolerance. Intense exercise and heat can increase discomfort, so meal plans should be rehearsed under conditions resembling the intended event rather than selected by speed claims alone.