Below is a more in depth explanation of what happens to the joints and muscles as a corollary of those patterns pointed out in my post “normal posture“.  I have also pointed put pathologies that should follow from these changes.

FOOT

The left foot everts due to collapsing of the media and longitudinal arch, this may be due to weight bearing on the left foot over time.

As the arch collapses the tibio-talus internally rotates which in turn internally rotates the left hip and knee.

More left piriformis syndromes in the left glute as it becomes stretched in standing.

Reduced balancing ability on left foot as the arch has given way but the left hip abductors are better – this causes the “hip strategy”

More medial ankle sprains on left foot and more lateral ankle sprains on right foot.

More left tibialis posterior pain as Collapsing of the left foot arch will stretch and strain the muscle  

KNEE

Due to the external rotation of the right hip- there is increased recruitment of the right lateral hamstrings- this added to the relative tautness of the right it band (due to the adducted  right hip) will laterally rotate the right tibia due to the attachments of both these structures. So we have external rotation of the right hip and external rotation of the right tibia.

Consequences- the right popliteus will be stretched and may cause pain? 

HIP

-The relative decrease in height of the left leg lowers the left hip/pelvis on the left side. 

-the left innominate bone anteriorly rotates relative to the right 

Consequence- more FAI in left hips due to increased hip flexion in left hip.

The right hip is held in relative adduction which puts continual strain on right abductors which may become painful. Due to lengthened right hip abductors you will find a positive trendelenburg on the right side- this is not a motor control problem! But a reliance of using the IT band to stabilise the knee- the it band feels thicker on the right.

Balancing on the right leg is improved by the structure of the right foots arch ( stability).

More lateral hamstring strains on the right and more medial hamstring strains on the left leg as the right hip is externally rotated.

More right glute pain as externally rotates hip favours recruitment of the right glute- consequently the internally rotates left hip will favour the left medial hamstring and more strains will be expected there.

TORSO

The right hip is raised and brought closer to the right lower rib cage- shortening the quadratus lumborum on the right. The right QL will have to be recruited to bring up the shorter left leg with every step why over time may be strained.

The shortening of the right obliques due to the approximated right ribs to the right pelvis causes flattening of the right ribs relative to the left which will “flare out”.

SHOULDER

the flatter right ribs will make winging of the right scapula more apparent.

The right scapula/shoulder will drop due to the lower ribs/convex scoliosis of the spine to the clients left.

More right levator scapula pain as this muscle will be stretched.

More right shoulder impingement as right acromion arch is tilted downwards 

Alex is a sports massage therapist and personal trainer at Massage Muswell HIll