GLOSSARY

Weight Regain is an increase following a previous weight loss, with its causes and tissue or fluid contributions needing assessment.

Weight management includes prevention of unwanted change, intentional change and maintenance. The appropriate goal follows health, function, training and the person's priorities rather than a scale target alone. Energy balance is dynamic, and the same intake change will not produce a fixed linear trajectory indefinitely. Use trends under comparable measurement conditions and assess well-being and performance. A plan should be revised when it produces persistent fatigue, deteriorating training or escalating preoccupation with food and weight.

Short-term weight change can reflect water, glycogen, gastrointestinal contents and measurement conditions as well as tissue change. Review a sequence of comparable observations rather than reacting to one reading. A plateau can involve changing energy expenditure, intake, adherence or fluid shifts; it is not proof of permanent metabolic damage. After weight loss, maintenance requires ongoing support and an adjusted plan, with attention to appetite, activity, food access and the person's ability to sustain the changes.

For example, compare a recent weight trend with intake, activity, symptoms and training before changing the plan. A single reading after travel or a hard session can be misleading. Agree on a realistic direction and review point, and judge whether the strategy supports function and health as well as the intended change in mass.

Loss of body mass is not equivalent to loss of fat. An overly aggressive deficit can also reduce lean tissue and impair training or recovery. Adequate protein, resistance exercise and sufficient overall nutrition help support lean-tissue preservation, but outcomes vary. Interpret body-composition measurements with their uncertainty and hydration dependence. In sport, prioritize useful function and health rather than promising that any diet can remove only fat while preserving every aspect of performance.