hp and mv calculation

[Theleus]

Here is an example of a con score from one of my characters.
CON 18/18 Bonus: +4

At a level up, which of these numbers influences hp and movement gained and do outside influences, such as magic trinkets and spells like trollish vigor affect this growth.

I guess what I'm saying is that even if there is a 19 CON trainer out there somewhere, does it have any discernible affect?

[Selveem]

Please read help ability score bonus helpfile.

[Theleus]

Wow, thanks, very useful.