I have recently been advised to invest in some orthotics after persistent lower leg problems. As I understand it, there are a number of ones to choose from, for instance, permanent or semi-permanent etc. Does anyone have any experience as to which might be the best option. For example, I have been advised that permanent orthotics, as they are more inflexible than semi-permanent, long term, may be offsetting the problem to another part of the lower body (e.g. Knee or Hip)? Whilst semi-permanent orthotics won't last as long, they may offer more shock absorbancy. Any thoughts would be greatfully received.