Why junk costs you
Every item has a weight, and your character can only move freely under a carry limit set mostly by Strength. Go over it and you slow down, lose endurance and, in Build 42, risk muscle strain in the back and torso. The carry weight guide covers the stages in detail.
Small junk rarely breaks your limit on its own. The problem is that it fills the space you need for food, water and medical supplies on the way home, and it clutters the inventory list when you are trying to find a bandage in a hurry. A good looting habit is to ask one question before you pick something up: what will I actually do with this?
