In a message dated 01/09/98 01:47:22 GMT, you write:

<< "......An in vitro method that simulated "static" stance was used to
 determine the loading characteristics of the plantar aponeurosis. Nine test
 conditions were evaluated with eight different wedge (6degrees)
 combinations and a level plane serving as the control. Each of the forefoot
 wedge treatment groups was statistically distinct compared to the neutral
 control, with lateral forefoot wedges decreasing the strain in the plantar
 aponeurosis and the medial forefoot wedges increasing strain (p<0.05). The
 rearfoot wedge conditions that did not combine the use of a forefoot wedge
 were not statistically different from the control (p.0.05)"
  >>

This suggests that lateral wedges reduce the strain on the fascia. However,
for the windlass to be effective, the fascia needs to under tension. Whilst a
lateral wedge may reduce tension and therefore discomfort during a symptomatic
phase, it may not be causing normal function.

If we consider two feet, one pronated at toe off, the other relatively more
supinated, surley both will aply tension to the fascia. However, in the
former, the distance from heel to the met head will be further than in the
2nd. Perhaps the former applies tension whilst the fascia is stretched, whilst
the latter applies tension whilst the fascia is shortened. Furthermore, in the
first instance, the distance between the fascia and the calcaneus near the
insertion will be relatively small, whilst in the latter it will be relatively
larger. This may effect the compression on the soft tissues between the fascia
and the calcaneus. 

I have thought of a study to investigate this but have been unable to interest
the necessary parties to date. Any offers?

Trevor Prior


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