you got flat feet then.(dropped arches ) I have , they reckon insoles do help, used them when I was younger but never bothered as I got older . and seem ok, but having flat feet they reckon can give back probs what ive had for 40 years (bad back). so might be worth getting the feet sorted out . Get some proper orthotics Ray, after paying for various physios with my back I got referred to one through the nhs who helped my back and prescribed orthotics and I had a good relatively pain free winter at work. Your stance and posture have a big effect on your back and you don't realise your doing