joints and muscles of the body function most efficiently when they are
in physical balance. Principles of engineering have shown that with any
physical entity, whether it is a bridge, a building, or the human body-
Structure dictates function.
The body is a
biomechanical kinetic chain where abnormal movements at one line, or
joint, can interfere with proper movements at other joints.
standing and walking, our bodies are subjected to natural forces and
postures that can inflict mechanical stress and strain throughout the
interrelated chain of joints and muscles.
imbalance is present, there is a negative impact on the knees, hips,
pelvis, and spine. Some patients must have these abnormal forces
reduced before they can achieve improved spinal function.
Pronation describes the rotation of a body part downward or inward. It
is actually a normal motion that occurs when walking; however, if it
happens excessively, pronation can cause global postural problems. The
major cause of over-pronation is a decrease in the arch height.
Postural Effects from Imbalances in the Feet:
A loss of arch height will cause a flattening and rolling in of the
foot- this is termed pronation. Because everything is connected, the
bones of the leg also inwardly rotate.
rotation of the bones of the leg (tibia and femur) will cause
unnecessary stresses on the knee as well as twisting of the pelvis and
spine. If the pronation is more prevalent on one side, there can be a
resultant unleveling of the pelvis and a functional scoliosis.
Tilting of the pelvis places tension on muscles and connective tissues, which can eventually lead to chronic back problems.
High levels of heel-strike shock can result from breakdown of the
body's natural "shock absorbers." The shock wave then transmits up the
kinetic chain causing painful symptoms all the way up to the head,
slowed recovery of leg and spine injuries, and aggravation of other