Tight hamstrings are not your problem – and neither is a tight IT band
Stiffness sounds like a bad thing; elasticity sounds like a good thing. But they're not opposites. Learn how to develop muscles that are both stiff and elastic.
If you've been regularly practicing the exercises described in Dr. Lavine's Top Five Exercises for Your Low Back, your lower spine has probably made a lot of progress. Still, you might need something extra to achieve maximal results. What’s the most important exercise I’ve left off my short list? Stretching the piriformis muscle.