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Criteria for Abnormal Pronation Five criteria are used to determine whether pronation is abnormal.Unnecessary destructive compensatory motion occurs in the other planes of motion of the STJ.4 Causes of Abnormal Foot Mechanics Three pathological situations contribute to abnormal foot mechanics: structural malalignment, muscle weakness or imbalance, and loss of structural integritySTJ pronation is more than the normal 4 to 6 degrees.4,27,36,75 2.3.4.5.

Criteria for Abnormal Pronation
Five criteria are used to determine whether pronation is
abnormal. Pronation is considered an abnormal mechanical
condition when the following conditions are present:

1. STJ pronation is more than the normal 4 to 6 degrees.4,27,36,75


2. The foot pronates at the wrong time, disrupting the normal
   sequencing of events during closed kinetic chain motion.


3. Pronation is recurrent, with each step contributing to
   repetitive microtrauma to musculoskeletal structures.


4. Pronation happens at a location other than the STJ (e.g.,
   when MTJ pronation compensates for limited STJ motion).


5. Unnecessary destructive compensatory motion occurs in
   the other planes of motion of the STJ.4
   Causes of Abnormal Foot Mechanics
   Three pathological situations contribute to abnormal foot
   mechanics: structural malalignment, muscle weakness or
   imbalance, and loss of structural integrity