http://paragonwiki.com/wiki/Inherent_Fitness
You will need to respec characters that you already took the Fitness pool on to take advantage of Inherent Fitness.
Fitness was made to be inherent at level 2. Characters with the old version of Fitness still have it (and not the inherent version) unless/until they respec.
Goodbye may seem forever
Farewell is like the end
But in my heart's the memory
And there you'll always be
-- The Fox and the Hound
So I was playing my new character and when I was managing the enchancements I noticed that she has the fitness powers already. Did they make it so all characters get those now? What about my characters that I trained the fitness powers too?