Flat feet describe the foot's shape, not its movement. A low arch does not determine the need for a stability shoe. Runners should focus on how they move while running, not just their foot shape.

Pronation, the inward roll of the foot, varies among runners. A wet footprint or old shoe wear can provide clues but are not definitive. Observing running movement is crucial for selecting the right shoe. Read more gear coverage.

Neutral and stability shoes have different designs. A neutral shoe offers less guidance, while a stability shoe provides more support. Runners should test multiple options to find what feels best for them. Related: Pacing in Marathons: Risk Management for Runners.

This original Runner World brief is based on reporting from Athletics Weekly. Visit the source for its complete reporting, context and any later corrections.