Sunday, December 16, 2018

Uneven Shoe Wear

Last Sunday, Lily told me she noticed her shoes wear fast, and right shoe wears faster than left shoes. The first cause came in mind was that she put more weight on the right foot. In addition to this, the running route selection, road surface condition etc could be reasons as well. I noted that we run counter clockwise most of the time during our morning exercises. I checked my running shoes, same observations, but less pronounced difference between the two shoes - which could be explained by her more frequent runs, longer distance, faster pace ...

In addition to physiological reason, running counter clockwise seemed to be another main reason. To check on this hypothesis,  I look at my walking shoes since walking is more random, times to turn left or turn left should be about the same thus the two shoes should wear about the same. For me, during my daily 1-mile after lunch loop walk, I actually alternate walking clockwise and counter clockwise. But the same wear pattern is observed, so walking/running counter clockwise is not a main reason for the uneven wear between the two shoes.

Checking internet, most answers to uneven wear are by chiropractors, and are physiological - one leg is slightly shorter than the other, one's spine is not straight, or misalignment of hip and pelvis  ....there are also claims that heart is on the left, so the left shoe should wear more - not the case for us.

How to solve the problem of uneven wear   unlike tires, we can not rotate shoes. But we can do the following:  a) if one leg is slight shorter than the other, put insole in one shoe with shorter leg may solve the problem; b) if spine is not straight or hip/pelvis misalignment, go see a chiropractor; c) randomize walking directions.

Ignore it if it does not bother you physically and psychologically 😊

                                      

Running shoes  - right shoe wear more (half year usage, more intensive)

                   
                                  
Running shoes - right shoe wears more  (~ 3 year usage )





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