Morrowind:Fatigue

How tired you are. Running, attacking, jumping, ... will drain fatigue. Low fatigue makes it harder to successfully perform actions.

Fatigue affects your chance of success in performing various actions.

Total Fatigue

The green Fatigue bar in the lower left corner of the screen indicates your character's current and maximum fatigue.

In mathematical terms, Maximum Fatigue = Strength + Willpower + Agility + Endurance.

Therefore, the highest value of Fatigue that can be reached without the help of magical effects is 400 = 4 * 100 points.

Losing Fatigue and Consequences

A character's fatigue indicator will decrease when they perform exercises such as running, jumping, or attacking, indicating roughly how tired they are. Fatigue plays a part in many actions, so the lower a character's Fatigue gets, the more difficult it becomes to fight, cast spells, or do anything else effectively. A low fatigue will even reduce the height of jumps. Surprisingly, even Mercantile is affected by fatigue. Similarly, with Fatigue raised above the derived total, skills become more effective.

If the maximum fatigue of an NPC is set to a zero or negative value (mainly through Damage Attribute), that NPC will collapse to the ground in the same manner of exhausting their stamina through hand-to-hand combat, until the three-day cycle resets. If this happens to the player (mainly through Reflecting this aggression), it will count as a death.

Replenish Fatigue

Fatigue will regenerate over time as the character performs less strenuous actions, and can also be restored with Restore Fatigue potions, items, or spells. You can also wait or sleep for 1 hour to restore your Fatigue.

Your natural fatigue regeneration is 2.5 + (0.02 * Endurance) fatigue/sec.

Cost of Various Activities

Activity	Cost
Running*	5 per second
Swimming*	7 per second

* Plus an encumbrance penalty