Pierrynowski et al hypothesised that "individuals who have a history of knee pain during repetitive weightbearing activities have a higher subtalar joint inclination angle than those with a history of foot pain".
JAPMA published this study in 2003 and the findings can help all clinicians better identify the causes of patient knee and foot pain.
For the purpose of this study, a subtalar joint angle of 42 was accepted as average.
Pierrynowski et al state "if a person has a lower subtalar joint inclination angle, more inversion/eversion foot rotation is associated with a fixed amount of external/internal lower-leg rotation".
The converse is therefore theorised with higher subtalar inclination angle leading to greater lower leg rotation vs frontal foot rotation, leading to excessive knee joint stress.
Study subjects performed both open and closed chain kinetic exercises with infrared light-emitting diode markers at bilateral rearfoot, lower leg and thigh.
Results of the testing supported the authors original hypothesis.
Results of this study support the hypothesis that a higher subtalar joint inclination angle may predispose an individual to knee pain, and a lower subtalar joint inclination angle to foot pain.
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