-If lower back pain is being caused by strength training, a) unilateral exercises and b) psoas strengthening and/or stretching exercises will help overcome this dilemma.
This whole update is fantastic! These two lines in particular are near and dear to my heart. Not only is overall posture aesthetically pleasing, it's paramount to proper digestion, nerve conduction and lymphatic flow. The psoas work has also taken some of my patients from complete constipation issues to having regular bowel movements. People underestimate the importance of proper movement and strength work. I love that you have discovered this on your own and highlighted it!-Tensing the entire body during any exercise will always improve overall stature.
Keep up the great work, your journey is very helpful to others.