Members do not see these Ads. Sign Up.

Been meaning to start this one for a while.

A lot of our discussions re Biomechancial theory revolve around the forces acting on tissue ie Kinetics

We have also had discussions that changes in movement or position ie kinematics are not as important.

If we agree that strain in the plantar fascia which is too great and/or at the wrong stage of gait leads to plantar fascia pain. ie as the distance between the origin and the insertion increases so does strain in the plantar fascia.

To reduce the strain we must reduce the distance between those 2 points at the appropriate time - ie a change in kinematics to change the strain acting on the plantar fascia.

If we just change the Kinetic of the joints which effect strain in the plantar fascia without changing the kinematics we will not reduce the stain in the fascia.

as an example if we look at dorsiflexion stiffness and the windlass mechancism - if we reduce the dorsiflexion stiffness with an orthotic designbut there is no change in the amount that the MTPJ dorsiflexes then the will be no change in the windlass mechanism and thus strain in the plantar fascia will remain the same - if we only look at MTPJ in isolation.

As usual some reading.

The windlass mechanism of the foot. A mechanical model to explain pathology EA Fuller absract only

THE MECHANICS OF THE FOOT II. THE PLANTAR APONEUROSIS AND THE ARCH BY J. H. HICKS

Foot mobility and plantar fascia elasticity in patients with plantar fasciitis

A dynamic model of the windlass mechanism of the foot: evidence for early stance phase preloading of the plantar aponeurosis