As I said, you do inspire me every day to go out and "get 'em." I am a healthier and more fit person largely because of you.
You have inspired me with many of the courageous posts you've shared on the Undies thread, too. Your perseverance in the midst of months of severe trials has been an inspiration in itself!
I say go to boxing. It's something you love that brings you joy. It might lift you a little bit, even if only for a minute here and there. Just smile at the cheerful guys. You don't have to have long chit-chat. It's OK to be a little quieter today.