Vim and VigorSource Healer's Handbook pg. 15
You rebound more quickly than normal when you draw upon your inner reserve to repair your wounds.
Prerequisites: Con 13, Combat Vigor, Endurance, character level 3rd.
Benefit: Your vigor pool gains 1 vigor point. The fatigued condition that you gain from spending vigor points (as described by the Combat Vigor feat on page 14) lasts for 3 rounds instead of 1 minute. In addition, when you take this feat, you gain a +2 bonus on saving throws against effects that cause fatigue or exhaustion.