Start with whether there is a problem
The NHS says flat feet usually do not cause problems and do not require action when they are not causing difficulties. For a runner, that makes the first question simple: what are you trying to improve? If your existing shoes fit and your running setup works, a low arch in a mirror does not create an automatic shopping task. You can still prefer a stability shoe, but preference is different from a requirement. This distinction prevents unnecessary changes made only to satisfy a footprint chart.
A low arch does not specify an interior shape
The label flat feet does not reveal the amount of space you need over the instep, the shape of your toes or the heel fit you prefer. One person may welcome a noticeable contour beneath the arch; another may dislike it immediately. Treat that contact as a fitting observation rather than a feature you must learn to tolerate. Compare the interior of the actual models, especially if you have previously found that apparently supportive shoes press into the middle of your foot.
When comparing stability is reasonable
A guided model is worth investigating when you have liked that type of shoe before, want to compare its feel or have been advised to consider particular construction features. Try it alongside another pair that meets your basic size and width needs. The comparison should answer whether you prefer the complete shoe, not whether the category label matches your arch. If the stability model fits well, you do not need an additional justification to like it. If a neutral pair feels better, do not reject it simply because an online checklist said low arches require something else.
Separate a new foot change from routine shopping
Longstanding foot shape and a new change deserve different conversations. NHS guidance recommends assessment when flat feet are newly developed, affect only one foot, or come with problems such as pain, weakness or walking difficulty. Buying a stronger shoe is not a substitute for asking about that change. For a routine replacement without those concerns, keep the purchase modest: preserve the features that worked, compare any changed fit in a new generation and avoid assuming a more aggressive arch contour represents progress. The useful result is a comfortable setup for your activity, not a different-looking footprint.
Questions about this topic
Should I buy stability shoes preventively because my arches are low?
Arch shape alone does not establish an individual preventive benefit. Base a routine purchase on fit and activity, and discuss specific health concerns with an appropriate professional.
Can a running shoe rebuild my arch?
A shoe comparison cannot promise to change your foot structure. Evaluate what the footwear offers in fit and use rather than expecting a change in arch appearance.