Originally Posted by Thrasher 
The mechanics are just like regenerating health. It absorbs damage. You can wrap whatever words you want around it, but it is regenerating health.
Not really, I think. The actual physical damage is represented only by "health" (which does not regenerate and is only recoverable on rest). Stamina represents how "shattered" or indeed tired character is by a hit (and character is knocked out when it reaches zero). The former is obviously meant to be a somewhat long-term resource, while the latter is meant to be short-term.
The question is what kind of resting mechanic is on the table.
Originally Posted by Thrasher 
Are their spells or potions to restore stamina? I didn't see those described anywhere.
As per the post above:
Francine the priest casts restore stamina on Bob