From the moment my girlfriend stands her SI joint and lumbar spine burn and has a dull ache too.
She has ankylosing spondylitis and had to buy a seated walker so that she can stop and sit to take weight off of her SI joint and spine.
With the "Moving Around" descriptor are the distances for when the pain starts and it makes her want to stop (but she carries on and pushes through) or when she has to stop and rest because the pain is just unbearable?