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Tension on the plantar fascia

Posted by AmyM on 3/03/02 at 15:32 (075561)

Does anyone know how much tension there is on the plantar fascia? (for example lbs/sq inch)
Is the tension on the fascia equal to a persons body weight? (I think thats what it says in the heel pain book)
How does the tension on the fascia change during walking?

If anyone has any idea's I'd love to know.

Re: Tension on the plantar fascia

Ed Davis, DPM on 3/04/02 at 15:32 (075648)

I am not aware of any scientific studies providng a precise answer to this question. Scott does have some good diagrams in his book. Body weight, foot structure, the phase of gait, nuscle contracture all influence tension on the fascia. The tension fluctuates significantly during the gain cycle.
Ed

Re: Windlasses 1-3 (was Re: Tension on the plantar fascia

adam p on 3/05/02 at 22:18 (075791)

Irrespective of the tension issue, would you agree there
is a problem from 1) 'arch-fill' being a fulcrum/windlass
and 2) thick uppers material and/or snug fit in the toebox
being a second fulcrum/windlass for many patients? Also,
if tension is put on the fascia while its 'draped over'
arch-fill, the front of the calcaneus or tubercle becomes
*another* fulcrum to consider (I should have titled this
'Windlasses 1-4') and prescribing something that will
help more than harm, besides rest, is *HARD*?

AP

Re: Windlasses 1-3 (was Re: Tension on the plantar fascia

Ed Davis on 3/07/02 at 17:24 (075926)

A hard material in the area of the sole at the MTP joints increases plantar fascial tension via the windlass mechanism. Rigidity in the arch or shank area decreases midfoot flexion therby decreasing plantar fascial tension.
Ed

Re: Tension on the plantar fascia

Ed Davis, DPM on 3/04/02 at 15:32 (075648)

I am not aware of any scientific studies providng a precise answer to this question. Scott does have some good diagrams in his book. Body weight, foot structure, the phase of gait, nuscle contracture all influence tension on the fascia. The tension fluctuates significantly during the gain cycle.
Ed

Re: Windlasses 1-3 (was Re: Tension on the plantar fascia

adam p on 3/05/02 at 22:18 (075791)

Irrespective of the tension issue, would you agree there
is a problem from 1) 'arch-fill' being a fulcrum/windlass
and 2) thick uppers material and/or snug fit in the toebox
being a second fulcrum/windlass for many patients? Also,
if tension is put on the fascia while its 'draped over'
arch-fill, the front of the calcaneus or tubercle becomes
*another* fulcrum to consider (I should have titled this
'Windlasses 1-4') and prescribing something that will
help more than harm, besides rest, is *HARD*?

AP

Re: Windlasses 1-3 (was Re: Tension on the plantar fascia

Ed Davis on 3/07/02 at 17:24 (075926)

A hard material in the area of the sole at the MTP joints increases plantar fascial tension via the windlass mechanism. Rigidity in the arch or shank area decreases midfoot flexion therby decreasing plantar fascial tension.
Ed