"We assume that any external force applied systematically to a structure in formation alters it, causing significant and permanent damage."
I know our wallets are grateful for the shoe inheritance, but…
All children have their own footprint , according to their body, weight, stage of life... and anyone who wears a used shoe, no matter how little use it has had, will have to adapt their foot to the footprint of another child.
The president of the Portuguese Podiatry Association (APP), Manuel Azevedo Portela, explains that shoes adapt to the shape of the foot of the wearer, as well as the position of the foot on the ground or the way of walking.
Imagine that a child has flat feet - a condition that occurs when the curvature of the foot is not correct or does not exist at all. The shoes that they use will suffer deformations and wear in specific areas, caused by this same condition.
The shoe takes on a certain shape because of the wear caused by the feet of the first person who wore it.
This causes those who wear the shoes to feel discomfort when walking and may even change their way of walking to adapt to the wear and tear on the shoes. For example, they may walk with their feet more to the side if the wear is too much in one area.
Try the following exercise: Look at some shoes your child has worn. You will probably notice some wear on the heel, the curved upper part, the sole and the insole. This means that the shoes have become deformed due to the child's footsteps.
“Inheriting” shoes from a sibling or cousin , for example, especially at an early age, can prevent a child from walking in his or her own way.
When the feet are still growing and forming, if there is any “imperfection” in the footwear, the foot will deform as a result.
It is important that children wear well-fitting shoes during childhood, especially between the ages of 2-3 and 6-7.
At this stage, the use of shoes already worn by other children harms the position of the feet and influences the movement and position of the leg, putting the correct formation of the lower limbs at risk.
Two children may wear the same shoe size, but have completely different feet: wider, more recessed, narrower... Therefore, wearing second-hand shoes can have negative effects on the health of the feet and spine.
In addition to these factors, it is also important not to accept inherited shoes due to hygiene concerns . Children sweat a lot and shoes can absorb bad odors and sometimes even cause the insole to become dark and dirty.
With all this, we want to warn parents not to accept other children's shoes.
Always remember that the hips, spine, knees and feet are the areas most affected when wearing shoes that are already deformed.
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We did an EXPERIMENT!
We put together two shoes of the same model as Victoria. One new and one worn by an 8-year-old child. See the result! 
