Making the weight: a case study from professional boxing.

Area of Science:

• Sports Science
• Sports Nutrition
• Combat Sports Physiology

Background:

• Professional boxing involves weight classes, with athletes often using severe energy restriction and dehydration to
• making weight
• posing health risks and impacting performance.
• This case study explores an alternative, structured weight-making strategy for a professional boxer.

Observation:

• A 12-week intervention involved a male boxer adhering to a diet near his resting metabolic rate (6-7 MJ) with a macronutrient split of 40% carbohydrate, 38% protein, and 22% fat.
• The boxer achieved an average body mass loss of 0.9 ± 0.4 kg/week, totaling 9.4 kg, reducing body fat from 12.1% to 7.0%.
• Post-weigh-in, a high-carbohydrate diet (12 g/kg) and hydration strategy were employed, allowing the boxer to compete at 63.2 kg.

Findings:

• The gradual weight-making approach successfully reduced body mass and body fat percentage without relying on dehydration.
• The athlete successfully made weight for the 59-kg superfeatherweight division.
• This strategy represents a significant departure from traditional, potentially harmful weight-making practices in boxing.

Implications:

• Demonstrates a viable, healthier alternative to acute dehydration and extreme dieting for boxers.
• Highlights the importance of athlete and coach willingness to adopt evidence-based, novel nutritional strategies.
• Suggests that structured, gradual weight management can be achieved through controlled energy intake and expenditure, preserving performance and athlete health.