I'm currently in my 7th year of the career, have a 21-8 record, basically all of my stats are up the top (over 70 and on 90), and for some reason my conditioning will no longer move past 49%. Is it because of age, or something? My guy is 28 now.  Normally I'd train, spar etc, and my conditioning and fatigue would go up to 100%, but now only my fatigue will while the conditioning barely moves. Means I end up going into most fights with really low conditioning and low fatigue, or I go for slightly higher conditioning and super high fatigue. It just suddenly started happening so I was wondering why, and if there's a way to change it?

I found that after a while it was impossible to keep the conditioning up. Anything you can do to raise it also raises your fatigue way more. So then resting negates getting the conditioning. 
 
I was going into fights 0% for both condition and fatigue since I"m pretty sure fatigue ruins your cardio.