Generally, when you walk or run the movement is called bipedal. A perfect bipedal is:

1) Foot should stride equally with same ‘balanced’ distance

Foot should stride equally with same ‘balanced’ distance between right and left toe, if the hip flex or hamstring is tight on either side then one single stride can be shorter than the other which will force the tighter leg muscle to compensate to keep up (can lead to meniscus wear and tear) if knee is making cracking sounds when u bend - that is your meniscus chipping out. To save it is to equalize the flexibility (stretch) and strengthen (isolation such as leg curl/ext machine) it back on a bigger length. Squat is too compound movement yet for the leg to isolate and then re-learn to stride equally (neuron-muscular re-patterning technique)

 giving you the extra lift and longer stride coming from the arch alone.