Maintenance for the week of March 16:
• PC/Mac: No maintenance – March 16
• ESO Store and Account System for maintenance – March 18, 6:00AM EDT (10:00 UTC) - 4:00PM EDT (20:00 UTC)
If you mean actual running and not sprinting, the only way out of this is to open the Crown Store. I was having the exact same thing just today several times (and until some months ago every now and then). Not sure what causes this..