Weight class selection is a season-long decision made with adults who can measure it properly. The healthy version looks boring: eat enough to train hard, keep hydration steady, and choose a class you can hold within a small daily range without restricting food or fluid. Rapid dehydration in the days before a competition reduces strength, endurance and thermoregulation, and carries genuine medical risk. Growing athletes especially need supervision from medical staff and their school or federation process.
Key points
- Pick a class you can hold while eating and drinking normally in the days before competition, not one you must crash into.
- Long-term body composition changes come from consistent training and adequate food across months, not from anything done in the final week.
- Hydration is performance: even mild fluid loss reduces strength, reaction time and your ability to regulate temperature safely.
- Eat carbohydrate and protein after hard practices so training quality holds up through the season instead of declining week by week.
- Weight class decisions and body composition assessments belong to qualified medical staff and your school or federation process, not to teammates.
Common mistakes
- Cutting water in the days before weigh-in, which lowers strength and endurance and carries real medical risk including heat illness.
- Skipping meals to make a class, which drains practice quality and slowly costs the muscle you built during the offseason.
- Using saunas, plastic suits, or laxatives to drop weight quickly — these are prohibited in most competitive settings and are genuinely dangerous.
Put it into practice
Weekly readiness check
- Weigh in at the same time of day, in the same clothing, twice a week rather than every morning.
- Record training load, sleep and how practice felt beside each weight so trends become visible across a month.
- Check hydration with simple daily cues such as urine color and thirst, and correct it by drinking rather than waiting.
- Review the record with your coach and school medical staff before committing to any change of weight class.
weight classhydrationnutritionseason planning