My new favorite stretch.
I noticed after performing the Cossack stretch outlined in the joint mobility drill book, that my lower loosens up; the stiff/uncomfortable feeling goes away. Actually, my lower back feels tired, like its no longer under stress.
And so it appears, IMO, that tight hams play some indirect role in a tight lower back. And all the while I thought my hip flexors were the culprit.
Any comments/thoughts are welcome. Just something I thought is worth sharing...