How long does it take for a professional boxer to train for a 12 round fight?

Professional boxers typically train for a 12-round fight for several weeks to several months, with most camps lasting around 8 to 12 weeks. During this period, they focus on building endurance, strength, technique, and strategy, often training multiple times a day. The intensity and duration of training can vary based on the fighter's experience, the opponent, and the specifics of their training regimen. Ultimately, the preparation is tailored to ensure peak performance on fight night.