[M&M Guy]

Ok, patent leather high heels aside, what are orthodics and how do they help? I guess I've been lucky enough to avoid these types of problems, but every now and then I'll get sore shins, or feel a tweak in my achillies, and just wondering if it is shoe-related. I know there's no way to stop old age, but what else should I be aware of? Are these items basically well-made Dr. Scholl's insole pads, or are they more like a brace? If they fit inside your shoes, do you have to get the next size larger shoe to accomidate them? Any info would be helpful. I've found the older I get, I realize I know more than I ever did AND know way less than I thought I did.