Learn more in the Everyday Health Fitness Cente

It's normal for your muscles to feel sore 12 to 24 hours after a good workout. But if you have pain that occurs during your workout or immediately afterward, talk to your doctor. The same goes for muscle soreness that persists for more than a week or two. And while it's good to be dedicated to your exercise program, don't work out when you’re not feeling well or are extremely tired.