RusticlesI've said this in every thread, but no one seems to try this: get some good arch supports, put them in your daily shoes and work boots or any footwear you wear on a regular basis, but don't put them in your ski boots. I had shin-bang once upon a time, told my doctor about it, He recommended arch supports in my normal shoes as my feet weren't getting the support they needed and this was causing my shin bang. I shit you not, I did this and took 2 weeks off skiing, I have never had shin bang since, I have skied far more days than I used as well.
I will totally agree with you that putting a supportive footbed (designed/built for walking) into your everyday shoes is the most beneficial way address alignment-related problems and this is because you do the most help (or hurt) to your feet/ankles/knees in your everyday shoes. Everyone should be wearing footbeds because it will strengthen and condition your body every step of every day and that amounts to a lot of beneficial help. Footbeds in everyday shoes = super important.
But, I have definitely seen this not be the ultimate solution for many feet/boot problems, such as shin bang. This is due to the fact that as your footwear becomes more rigid, the need for a proper interface between your foot and boot increases. The most rigid form of footwear is a ski boot and this is why it is imperative to get a footbed in your ski boot- you have the greatest difference between foot and footwear here. Your foot and therefore ankle, shin, and knee will twist inside the boot and as this happens your shin is going to fight a losing war with the boot. The footbed will create that best interface between flexible foot and rigid footwear and thus be a huge safeguard against shin bang.
Now, is what I am talking about always
going to solve a person's shin bang? No, and I would never make any absolute claims that anything would, but this is about reducing your chances
of experiencing shin bang. And in that context, the best recipe is footbed in everyday footwear, footbed in ski boots, properly fitted ski boots, and proper skiing technique. Anything less is just increasing your odds for getting shin bang.