While raging, you are full of vigor and health.
Prerequisites: Con 15, rage class feature.
Benefit: Whenever you are raging, the morale bonus to your Constitution increases by +2. Your rage does not end if you become unconscious. While unconscious you must still expend rounds of rage per day each round.
Advanced Player’s Guide. Copyright 2010, Paizo Publishing, LLC; Author: Jason Bulmahn.