Question: Is It Normal to Feel Pain When Running?
When I first start running, my hamstrings feel really tight and sore. Is this normal, and can I run through it?
Answer: As you increase your distance and intensity, it's normal to feel some discomfort, such as sore muscles. Sometimes you'll feel soreness when you first start your run, but it feels better as you warm up and continue running. You shouldn't be feeling real pain, though. Watch out for pain that causes you to run with a limp or altered stride, or pain that keeps getting worse as you continue running. If you notice any of those red flags, you should stop running immediately and take a few days off.
More: "When Should I Run Through Pain?"
More: "When Should I Run Through Pain?"

