Train like a boxer is a phrase that refers to the practice of boxing as a form of exercise. Sparring is an important part of training for a boxer, as it allows them to practice their skills in a controlled environment. Sparring involves two boxers engaging in a simulated fight, with both participants wearing protective gear and following certain rules. This type of training helps boxers develop their technique, speed, and agility, as well as their ability to think on their feet.