Regenerator is almost as fast as a Super Soldier

As Freedom passed an intersection he saw movement out of the corner of his eye. A figure dashed across the road parallel to him, two blocks over and heading south. He saw the pale skin and thought an ex was inside the walls, but no ex moved that fast, even the ones Legion controlled. The captain turned his head and got a quick glimpse of the figure—a blood-splattered old man wearing khakis and a white T-shirt.
Freedom made a snap call. He pivoted and went after the man. “Six to Seven,” he called out. “Target engaged.”
Whoever he was chasing was fast, even barefoot. Not as fast as Freedom or the other super-soldiers, but enough that for a moment he worried he was chasing one of his own. He closed the gap. The old man was a few yards ahead. And he was running out of road. Beverly was just a block ahead.

Excerpt From Ex-Communication, pg 359
Peter Clines
https://books.apple.com/us/book/ex-communication/id635706546