I play on ps4 and have no mods. When I try to run, be it in sneak or not. Or on a horse, my guys feet act like their tied to weights for a second and then he'll start running again. When it's happening he can't Sprint. Same thing on a horse. At times it forces him into a walk. Does the same first or third pov. It's damn near game breaking glitch. Makes combat very difficult.
First I tried reloading a save game. Then created a new save and that didn't work. I did a hard reset on my ps4 and rebuilt the database. Deleted settings file. Nothing seems to work to fix it. I'm a male khajiit btw.
Only thing I didn't try was making a new game, but I doubt that'll work... Edit: It didn't.