From http://www.knee1.com/news/mainstory.cfm/318 —

This is a helpful and informative article. But the advice on stretching seems unreasonable:

The artcicle says: “Then do calf, hamstring, quadriceps, hip flexor, waist, glut, back, heel, inner thigh, and trunk stretches, holding each for 20 seconds and repeating six times.”

The author lists ten (10) different types of stretches. Each is to be held 20 seconds; so that’s 200 seconds to go through the list once. But we’re also told to repeat six times — so that’ll take 1200 seconds. That’s 20 minutes of stretching.

The article indicates this is recommended prior to running, and after running. That’s 40 total minutes of stretching each time you exercise!

Is this really what is intended? Is this the only way to avoid permanent knee injury?