My abs are becoming rock solid, if I don't say so myself. Of course, they are covered in a thick, great-if-you're-an-arctic-walrus-but-not-so-attractive-in-Hawaii layer of flab, so you really can't tell. I would love to attribute this to all the sit-ups and crunches and planks I do in the gym, but that would be misleading. My core strength can only be fairly credited to the kitties. Yes, it is they who have me clenching my rectus abdominis with great fervor each morning as they jump without warning up from the floor to land square in the middle of my gut. No clench, and my internal organs are toast. They do this when I am sound asleep, dead to the world, out like a light, snoozing soundly, so I am forced to wake up, realize what is happening and react, all in a nanosecond. It's got to be good training for something, though I'm not exactly sure what. I now rue the day when I learned to sleep on my back. All I can say is, "Ugh!" But my core thank...