The same pair of proprioceptive insoles are inside both pair of shoes (old and new):
Note the change in position/twist of the left foot
Unstable/Unevenly Worn Shoes - Gait Analysis
Impact on Proprioceptive Signal
Inventor and Designer of Postural Control Insoles
2. Old / Worn Shoes diminish the effectiveness of the insoles
1. Old / Worn Shoes distort the proprioceptive signal to the cerebellum (brain), which can increased foot twist
Shoes are one year old . The midsoles are medially compressed .
Note the increase in the left foot twist (pronation) when proprioceptive insoles are worn inside the old shoes.