Authors:

When boxers fight 3 minutes (per round), they have 3 minutes to box, so they are not in a hurry to show the judges who is winning. They have time to slow down their feet. In 2 minute (round) fights, they don't have time to slow down their feet. It's a fast speed because they only have 2 minutes.

Source: www.boxinginsider.com
When boxers fight 3 minutes (per round), they have 3 minutes to box, so they are not in a hurry to show the judges who is winning. They have time to slow down their feet. In 2 minute (round) fights, they don't have time