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Form fundamentals

Foot Strike

Heel, midfoot, or forefoot — what part of your foot hits the ground first.

Healthy range: No fixed target — context for overstriding

What it is

Foot strike is which part of the foot contacts the ground first: heel, midfoot, or forefoot. There is no objectively "best" strike — what matters is whether your foot lands under your hips (good) or out in front (overstriding).

Why it matters

Foot strike gets a lot of attention, but on its own it's not predictive of injury. A heel-striker landing under their hip is fine. A forefoot-striker overstriding is in trouble. We surface strike as context for the overstriding metric — not as something to "fix" in isolation.

How we detect it

At each foot contact, we compare the relative vertical positions of your heel, ankle, and toe landmarks. Whichever is lowest at contact wins. We report the dominant strike type plus a breakdown across the video.

How to fix it

Don't force a strike change. If your overstriding grade is good and you're not injured, your strike is fine — leave it alone. Forced midfoot transitions are a leading cause of calf and Achilles injuries.

Common symptoms when this is off

Calf tightness (if recently changed strike)Achilles pain