Three herniated discs in my neck, plantar fasciitis in my left foot, and this year I've developed a nice nagging case of tennis elbow in my right arm. I'm trying to walk about three miles a day but that is it.
While not really an injury, my feet are far and away the most difficult obstacle for me: I wear US size 11eeeeee on my left foot, and 10.5eeeeee on my right. My shoe choices are extremely limited to say the least, and I am constantly dealing with black toenails, pinched toes, and blisters from ill-fitting shoes. I think poorly fitting shoes is what brought on my plantar fasciitis.
Just a few minutes ago I drained a blister on my heel the size of a fifty cent piece, due to a 3.5 mile walk this morning in poorly fitting shoes.
Wouldn't it be worth your while to buy the same shoe in the two sizes you need? Up front cost would be high but i would think that if improperly sized shoes are causing all the issue, the savings in physical grief and medical bills would more the offset the high initial cost.
Last night found Dayton Boots through this site. They build a shoe/boot on demand and there they work with the customer to ensure a proper fit. They show some pretty extreme differentials to meet customer needs. Again high up front but you get footwear that works properly and can be resoled/reheeled when the time comes so will last for many years. Has to be other similar companies around.
http://www.daytonboots.com/
dave