fat fitness
Mostly I've learned that I have a particularly stunning ineptitude at navigating steep rocky slopes, and that breathing is a thing I REALLY take for granted.
When the dude at the front of my boxing class comes over to my bag and tells me to "WORK off those Christmas calories!" the only invigorating effect it has on me is in my rage-tear activation complex.
No matter how many times my best friend or girlfriend or aunts say they'd like to be more active or lose weight or start exercising again, I know that putting an ab cruncher under the tree is going to earn me some looks.