The Agony of the Two-Day Sore

A few weeks ago, I found a blog post about a woman who did 300 sit-ups a day for 30 days and her abs looked totally different. I have no intention of doing 300 sit-ups every day, but there was a time when I could, and my core could use a little, well, tightening. So I wrote down the sets and thought I'd try doing them a few times a week to see what happened.

Hubris was mine. I was born with strong abdominal muscles. Even when I was completely out of shape as a child, I could always do more th...