Delayed Onset Muscle Soreness, aka DOMS, is a phenomenon of muscle pain and soreness felt 12 to 48 hours following exercise. It is a normal part of working out and challenging your body. It means you definitely pushed yourself, but can be annoying depending on the degree of soreness, like after the first day of starting boot camp when your muscles are so sore you need help undressing. And yes I know that particular pain from experience. Even with those days of not being able to walk up and down stairs without wincing, I like to feel sore post workout. It makes me feel stronger. I am curious about you though . . .