GLOSSARY

Biological Maturation Progress toward an adult biological state, which is not fully represented by chronological age.

Young athletes need nutrition for growth, maturation, learning and health as well as exercise. Chronological age does not fully describe biological maturity, and growth spurts can change appetite and requirements. Plan accessible meals and snacks around school, travel and training with suitable family support. Avoid transferring adult weight-loss targets, body-composition ideals or supplement routines to children. Faltering growth, persistent fatigue, delayed development or restrictive eating calls for age-appropriate professional assessment rather than simply demanding greater discipline or more training.

Growth assessment compares accurate serial measurements with an age- and sex-appropriate standard or reference. Confirm exact age, measurement technique and the chosen chart. A percentile describes relative position; a z-score describes distance from the reference distribution under that chart's model. A change in trajectory can warrant assessment without establishing one nutritional cause. Adult body-mass categories do not transfer directly to children. For young athletes, interpret growth together with maturation, health and intake rather than treating a low body mass as evidence of superior fitness.

An adequate diet provides sufficient energy and essential nutrients while fitting health needs. A high score for variety or a healthy food label cannot independently demonstrate adequacy. Review what is actually eaten, including foods excluded and suitable replacements. Athletes can consume many vegetables yet still lack enough energy or carbohydrate for training. Assess the overall pattern, distribution and relevant nutrient risks rather than assuming that a single food or supplement makes the entire diet balanced.

Protein targets depend on body size, training, energy intake, age and clinical status. A high-protein label does not identify the actual amount, amino-acid quality or distribution. During weight reduction, adequate protein and resistance exercise can help preserve lean tissue, but neither removes the consequences of an excessive energy deficit. Kidney disease can require a different clinical approach. Do not transfer a healthy athlete's protein strategy directly to a person with impaired renal function.

Food availability describes what is present, whereas accessibility includes whether a person can obtain and use it. Cost, transport, opening hours, kitchen facilities, disability and team arrangements can all affect intake. Food insecurity concerns unreliable access to sufficient suitable food and is not resolved by telling someone to make better choices. Ask respectfully about constraints and identify practical support. A technically ideal sports menu is ineffective if the athlete cannot afford, prepare, store or reach the foods at the required time.

Fluid planning should consider sweat losses, conditions, tolerance and opportunities to drink. Carbohydrate and fluid needs can differ, so a single beverage may not meet both without adjustment. Excessive drinking can also be harmful; more fluid is not always better. Sodium provision may be relevant in selected prolonged or high-loss situations, but it does not make unlimited drinking safe. Practice the combined food-and-fluid plan in training and evaluate actual intake and symptoms rather than relying only on a product label.