How does stretching before exercises prevent a pulled muscle?

Depending on the severity/size (or Stage) of your disc herniation in both your clinical signs and in your MRI, Stage 3 (large, severe) slipped disc must undergo surgery to improve no other choice ! Early Stage 1 (small, mild) and Mid Stage 2 (moderate disc bulge) can be "managed" by physical therapy whenever it "acts up" but without surgery cannot be permanently "cured".

Hi there, Thank you for your question. Hamstring issues are very common in anyone who takes part in running sports. Often it from an overload over the muscle either at the muscle/tendon junction, tendon/bone attachment or within the body of the muscle itself. In situations where you develop sudden pain in the hamstring, the first thing to do is NOT to stretch. This is because if you have torn any of the areas I mention, it can make this worse. The best thing to do is to offload the muscle with crutches, apply ice and a compression in the form of a tubi-grip, and then seek help.