theres a stat called "speed" in morrowind. It determines your movement speed, and nothing else. this is the third most important factor in determining your movement speed.
theres a skill called athletics as well. this determines how fast you run - because running is different from walking. walking is extremely slow, so running is important. Athletics is the fourth most important factor in determining your movement speed.
theres another stat called "strength". among other things, it determines your carry capacity. the percentage of your current carrying capacity which is currently 'filled' determines how fast you move. In practice, this is the second most important factor in determining your character's movement speed.
Now, old hats of elder scrolls games can see where im going with this. most know that in skyrim, your speed is actually someone determined by your height. this means that, in practice, high elves are a little bit faster than everyone else. In morrowind, the characters also have different heights, and its actually more pronounced than in later games
This has no effect on movement speed*.
There is a secret stat, determined by race and gender, in morrowind and only morrowind. it is called 'Weight' and for some reason determines how wide chests are and how jacked your character looks when shirtless. For some reason, this hidden and unchangeable stat is the single biggest determinator of movement speed. A male wood elf, the smallest race at a diminutive .9 weight and a fast starting speed of 50, will move significantly slower than a male orc, the most jacked beefcake race at 1.35 weight with only 30 starting speed.
However, this also means that mechanically, women are just worse than men in morrowind because almost all female characters have a weight of .9. This Calculation is hard coded into the game.
*for some reason, height does affect vertical movement when levitating.