Here are some articles that might help you

What the Research Says About Walking and Back Pain Relief

How to Self-Treat Lower Back Sprain with Backwards Walking

Is Walking Good for Lower Back Pain?

Why Your Lower Back Hurts When Walking

Walking Speed for Lower Back Pain Relief

Fixing Back Ache From Running

Fixing Back Ache From Running

Causes of Lower Back Strain

Pelvic Tilt Exercises

Easy and Effective Lower Back Pain Exercises

How to Walk Away Lower Back Muscle Strain

Why Your Left Lower Back Hurts and How to Fix It

The Walking Collarbone Lift Exercise for Back Pain

Relieve Back Pain by Modifying Your Walking Arm Swing

Walking Lower Back Pain Away - Pelvic Rotation Tips

What to Think About When Walking Lower Back Pain Away