Delayed Onset Muscle Soreness (DOMS): a condition involving muscle overuse that usually results from a single intensive exercise bout. The discomfort begins at a muscle-tendon junction and spreads throughout the affected muscle. Soreness after almost any vigorous session of exercise is normal. DOMS is less common and probably indicates that you have stressed the muscle tissues beyond their normal capacity. DOMS hurts for a couple of days, but it’s not a serious condition and the symptoms will go away with rest.
Yep, that's where I am today. Action 162 - Deal With DOMS. My calves are really sore today, so I'm taking another day of rest instead of running. I'll get back to it tomorrow with a slow, short run, but not today.