GLOSSARY

Enteral Nutrition (EN) uses the gastrointestinal route for nutrition support; in clinical support terminology it commonly refers to tube-delivered feeding.

Enteral tube feeding delivers nutrition into the gastrointestinal tract when oral intake is inadequate or unsafe and the tract can be used. Tube location, access duration, aspiration risk and clinical condition influence the plan. Gastric and jejunal routes are not interchangeable in administration or tolerance. Formula, delivery pattern, hydration and medication handling need skilled coordination. Tube feeding is medical nutrition support, not an enhanced athletic fueling method, and requires monitoring for position-related problems, intolerance and other complications.

Enteral formulas differ in protein form, energy density, fiber, electrolyte composition and intended clinical use. Polymeric formulas contain intact nutrients, while semi-elemental and elemental products use more broken-down components in different formulations. A more specialized or expensive formula is not automatically better tolerated or clinically superior. The feeding route, digestive capacity, disease and total prescription guide selection. Bolus, intermittent and continuous delivery are distinct administration patterns whose suitability depends on the access route and patient needs.

Malnutrition can occur across body sizes, including in a person with obesity. Assessment considers reduced intake or assimilation, disease-related inflammation, weight trajectory and relevant body-composition or functional findings. Undernutrition, overnutrition and individual micronutrient deficiencies describe overlapping but distinct problems. A stable or high body weight cannot exclude inadequate nutrient supply or muscle loss. In an athlete, declining intake, recurrent illness or unintentional weight loss deserves assessment rather than automatic praise for becoming lighter.

After prolonged inadequate intake, restarting nutrition can produce dangerous shifts in phosphate, potassium, magnesium, thiamine demand and fluid balance. Risk depends on the clinical history and assessment, not only current body mass. Refeeding syndrome differs from a routine planned carbohydrate refeed during dieting. People at substantial risk need a carefully managed clinical plan with monitoring and appropriate support. Abruptly adding large amounts of food or supplements without assessment is not a safe shortcut to recovery from severe undernutrition.

A nutrition prescription specifies an individualized plan that can include energy, protein, other nutrients, fluid, food texture or route of delivery. The chosen body-weight reference, clinical condition and practical implementation must be clear when quantities are used. It should be monitored and revised as intake, treatment or health changes. In a clinical athlete, reconcile medical requirements with training rather than placing two incompatible prescriptions side by side and expecting the person to decide which one to follow.

Nutrition follow-up compares intended goals with actual intake, symptoms, function, relevant measurements and the person's experience. Specify the time frame and what would justify adjustment, continuation or referral. A treatment response can be beneficial, absent or adverse, and adherence alone does not prove effectiveness. Retain enough documentation to understand what changed. For an athlete, consider health and training quality alongside body mass or laboratory results so that apparent progress in one measure does not hide deterioration elsewhere.