Weight classes divide competitors by bodyweight so that athletes face opponents of similar size, ensuring fairer contests in sports where mass confers a major advantage — wrestling, boxing, judo, MMA, weightlifting and rowing (lightweight events). Athletes typically compete in the class at or just above their natural weight, though many cut weight to drop a class for a size edge over lighter opponents. Because extreme weight-cutting is dangerous, modern rules (such as weigh-ins scheduled close to competition) and sports-science guidance increasingly push athletes toward competing nearer their natural weight.
Key points
- Divisions by bodyweight for fair matchups
- Used in combat and strength sports
- Athletes may cut weight to drop a class
- Extreme cutting is dangerous and discouraged
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