Foot Arch Type Assessment

This sorts your foot into one of three arch types from a wet footprint, suggests shoes and insoles, and reads any pain you have against the arch. The arch types are real. How much they should decide your shoes is the part most shoe shops overstate, so the research section below is worth a minute.

The three arch types:

Flat Arch (Low Arch)

Little or no visible arch when standing, and the foot rolls inward (pronates) more than average as it lands. Flat feet have been linked with plantar fasciitis, shin pain and knee pain, but only weakly, and plenty of flat-footed people never get any of them. The usual advice is a stability or motion-control shoe.

Normal Arch (Neutral)

A visible arch and a moderate inward roll. It is the most common type rather than a superior one, and most shoe styles fit it.

High Arch (Underpronation)

A high arch rolls inward less than average, so the outer edge carries more of the load and the foot absorbs less shock. It has been linked with ankle sprains and some kinds of stress fracture. The usual advice is a cushioned, flexible neutral shoe, not motion control.

What the shoe-matching research found

The US military tested the standard advice directly. In three training programmes (Army, Air Force and Marine Corps), Knapik and colleagues gave recruits shoes matched to their arch, motion control for flat feet, stability for normal and cushioned for high, and compared them with recruits who all got the same stability shoe. Injury rates came out the same.

A 2014 study of 927 novice runners, all in neutral shoes (Nielsen and colleagues), found the same thing from the other side: runners whose feet pronated were no more likely to be injured over a year, and they had fewer injuries per 1,000 km than the neutral group.

So the best-supported way to choose is the dull one. Try on the type suggested here, and keep it only if it feels comfortable from the first run or shift. Benno Nigg’s group calls this the comfort filter, and in one military study, letting soldiers pick the insole that felt best lowered their injury rate.

The Wet Test:

A quick self-test: wet the bottom of your foot and step on a piece of paper or cardboard. Look at the footprint:

• Full print (little or no curve inward): Flat arch
• Moderate curve inward (about half the foot visible): Normal arch
• Extreme curve inward (very thin strip or gap): High arch

When to see a podiatrist:

If you have foot pain that interferes with daily activity, recurring injuries, or significant asymmetry between your feet, a podiatrist can provide a full gait analysis and custom orthotic recommendations.