GLOSSARY

Competition Weight Management Table

Competition mass decisions must respect health and the actual weigh-in interval; rapid water loss can impair safety and performance.

Weight-Class Sport describes a sport in which competition is organized by body-mass categories and athletes must satisfy the relevant weigh-in rules. Category eligibility does not establish the safety of the methods used to reach it.

A weigh-in determines eligibility under a sport's particular rules and timing. It does not show that a given mass was reached safely or will support performance. Acute dehydration and severe restriction can impair health and recovery, and a later refeeding period does not guarantee reversal of every effect. Long-term preparation and appropriate category selection deserve priority. This glossary explains the concepts without providing a rapid weight-cutting protocol or assuming that a lower competition category is always advantageous.

A body-mass goal should serve health and the demands of the sport rather than an assumed ideal appearance. A lower number can reduce absolute power, recovery or availability of energy even when a simple power-to-mass ratio appears attractive. Performance depends on technique, conditioning and many other factors. Planned changes should be evaluated over an appropriate period with consent and suitable professional support, especially when an athlete already has low body fat or competes in a weight category.

Body mass and composition can affect the demands of moving the body, but their relationship to performance depends on the task. Absolute strength, power, technique, endurance, skill and recovery may matter differently between sports. Dividing performance by mass can improve a ratio even when absolute performance declines. A nutrition change should therefore be judged against the actual event and health outcomes. There is no universal body-fat percentage or competition weight that guarantees success across athletes.