Weight classes are categories used in sports, particularly in combat sports like boxing and mixed martial arts, to ensure fair competition. Athletes are grouped based on their body weight, allowing competitors to face opponents of similar size and strength. This system helps to prevent mismatches that could lead to injuries and promotes a level playing field. Each sport has its own specific weight classes, which can vary widely. For example, in boxing, there are classes such as featherweight and heavyweight, while in wrestling, categories may include lightweight and super heavyweight. These classifications help athletes to compete against others who are physically comparable.