Ok I´ve been going on about this for awhile now - thought it was time for a discussion.
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There have been many discussion about Functional Hallux Limitus FnHL and the roll it playes in changing of gait - Sagittial plane theory.
There have been discussions if the increase in dorsiflexion stiffness at the 1st MTP and we should include all MTP joints is from the results of mechanical stress- ie increase in internal and external plantarflexion moments at the MTP joint.
There have been discussions about the reverse windlass mechanism
I´m of the school of thought the an increase in dorsiflexion stiffness is the result not the cause.
Heres a little expriement I do when discussing this.
Now I believe that a change in the dorsiflexion stiffness of all MTP joints during gait maybe a good thing, by changing the length of the lever arm of the foot the loads placed on the Plantar fascia and triceps surea will increase and if this load does not lead to pathology we will have great energy return and more effective gait.
I believe it all comes down to timing andor load. So increasing the dorsiflexion stiffness at the MTP may be very important.
Thoughts ?
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