Dual addictions

So I mentioned yesterday that I'm back to working out twice a day because I'm in dire need of the endorphin rush.  But I've realized it's not just the good feelings I'm addicted to.  I'm starting...to enjoy the pain.  At Bar Method, I'm able to embrace the shaking and power through.  The pain means I'm getting somewhere.  And tonight, in a really intense yoga class, instead of getting angry, I just breathed more and went deeper into the pose.  I'm not sure whether it's using physical pain to escape emotional issues or that I'm embracing new challenges, but whatever it is, I'm going with it.