The material below is Open Game Content from a 3PP Source
You have enhanced physical stamina.
Benefit: You gain +3 hit points. For every Hit Die you possess beyond 3, you gain an additional +1 hit point. If you have more than 3 Hit Dice, you gain +1 hit points whenever you gain a Hit Die (such as when you gain a level).
The material below is Open Game Content from the System Reference Document.
Benefit: You gain +3 hit points.
Special: A character may gain this feat multiple times. Its effects stack.