GymBunny wrote:Thanks Pingu, but tis a slight over-exaggeration to say all my posts are fascinating.
I meant in this thread!

Wouldn't go as far to say ALL of them are....

I am fascinated by biomechanics ergo your posts here have been fascinating.
GymBunny wrote:The arch of the foot absorbs force when the feet impact the ground, stretching tendons in multiple directions, flattening and deflecting momentum. ‘Supporting’ the arch of the foot by placing it on a convex orthotic would make it virtually impossible for it to function as a shock absorber.
The arch support, which is present in all running footwear, would interfere with the downward deflection of the medial arch on loading. Furthermore, the use of orthodics, or other structures that are fitted to the mold of the soft tissues of the foot, could cause similar difficulty. Such designs occur when an engineer looks at the foot as an inflexible lever which is delicate and thus requires packaging. Various myths persist about foot behavior due to poor understanding of its biology. (Robbins and Hanna 1987)
This is a good point and not something I had thought of. However, for me, it is correct the fact that one leg is nearly an inch longer than the other which in turn puts great stress on my knees, hips, back etc etc.