For the last year or so I have been experiencing some lower back tightness from time to time. It does not really bother me when I run so I kept putting off doing something about it. As is often the case I finally got the inspiration to do something and decided to add what I call box situps after my run. This is a variation of an Egoscue situp. Right now I do just 20 after my run each day and after only 2 days things have improved.Also my digestion seemed to have improved and also my energy levels. Go figure!