Encumbrance

The rule for lifting an carrying are intentionally simple. Here is a variant if you are looking for more detailed rules for determining how a character is hindered by the weight of equipment. When you use this variant, ignore the Strength column of the Armor table in chapter 5, "Equipment."

If you carry weight in excess of 5 times your Strength score, you are  encumbered, which means your speed drops by 10.

If you carry weight in excess of 10 times your Strength score, up to your maximum carrying capacity, you are instead  heavily encumbered, which means your speed drops by 20 feet and you have disadvantage on ability checks, attack rolls, and saving throws that use Strength, Dexterity, or Constitution.