Originally Posted by
CJ Gotcher
This is one important thing to note. Tom mentioned that flat or high arches are rarely a problem for lifting... but efforts to compensate for them often are.
Stick to the basic metrics first: knees tracking the toes, weight balanced on the midfoot (laterally and forwards/backwards), bent over appropriately for your bar position and anthropometry, keeping the back in rigid extension, executing a quality squat. You might be surprised how quickly the body adapts to accomplish the task.