GLOSSARY

Indigestion (Dyspepsia) is an upper-abdominal symptom complex, not synonymous with proven biochemical maldigestion.

Reflux is backward movement of contents; gastroesophageal reflux can produce heartburn, but not all dyspepsia has that cause. Meal size, exercise timing and body position may contribute. Chest pain should not automatically be classified as digestive, especially with exertion, breathlessness or severe associated symptoms. Appropriate assessment matters more than uncertain self-treatment or assuming a familiar burning sensation explains every episode during sport.

The stomach stores and mixes food and regulates release into the intestine. Acid supports protein denaturation and pepsin function, but does not complete all digestion. Denaturation changes protein folding rather than cutting every peptide bond. An empty-feeling stomach does not establish completed meal absorption; intestinal stages remain important. Stomach handling and systemic nutrient delivery therefore require separate interpretation when planning exercise after eating.

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.

When recording discomfort after a session, consider food, portion, timing and intensity together; review recurrence and other factors before broad exclusions while preserving adequate nutrition.

Gastric accommodation allows the upper stomach to relax and accept food without a proportional pressure rise. Distension describes stretching or enlargement; the terms are not identical measurements. Fullness, actual volume and emptying speed also differ. Gradual intake and testing meal portions are more practical for athletes than trying to enlarge the stomach by forcing uncomfortable volumes. Repeated discomfort is information for adjustment, not a training target itself.

For sports use, consider meal size and timing together with fluids, intensity and composition. Large, fiber-rich or fatty meals close to exercise trouble some individuals, but tolerance varies. Changing one factor during training and recording responses helps identify patterns. First-time competition products or broad food exclusions without a replacement plan do not substitute for this practical evaluation and can compromise adequate fueling.

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.