Boxers who are competing are grouped into different categories based on their weight. This is because the more weight a boxer is carrying, the more force they will have behind their punch. It would be unfair to have a boxer weighing 80 kilos against one weighing 120kg.
As a general rule the boxer who is tallest will have the most advantage (due to punch range) so therefore the weight category a boxer competes in will be one where he can be as strong as possible relative to his/her height.
For the purposes of this course (with it being a 12 weeks long) we are aiming for you try and lose 5kg in weight. If you are someone who is not taking this course specifically to lose weight, you will still want to understand the best way to cut weight in order to compete. People rarely box at their natural walk around weight and usually have to lose a few kilos. However whether you want to lose weight for health reason, competition reasons or aesthetic reasons (get ripped) then the information is all relevant.
When it comes to making your target fight weight and developing a boxers physique, the first thing you need to know about is lean muscle mass, which is the subject of the next lesson.