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The big toe is the "ignition switch" for efficient walking propulsion via the windlass mechanism, where dorsiflexion winds the plantar fascia tight to stiffen the arch and transfer glute power forward.
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Windlass mechanism at toe-off
As the big toe extends (40–65° dorsiflexion), it tensions the plantar fascia like a cable around the metatarsal heads, elevating the medial arch and locking the foot into a rigid lever for push-off.
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This supination stores elastic energy during pronation (mid-stance shock absorption) and releases it for propulsion, boosting stride efficiency by 10–20% with glutes firing upstream.
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Upstream prerequisites
Ankle dorsiflexion (10–15° minimum): Allows tibia to advance over the foot so big toe can fully extend without early heel-off or compensatory hip hiking.
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Hip extension: Glutes extend the femur fully, loading the ankle/foot complex for maximal windlass activation and smooth glute-toe sequencing.
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Common breakdowns
Stiff big toe or limited dorsiflexion delays windlass, flattening the arch, leaking power, and forcing calves/knees/hips to overwork, reducing stride length and increasing injury risk.
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Rigid toe-box shoes or elevated heels block extension, disrupting the chain and mimicking flat-foot compensations.
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Reprogramming cues
Walk mindfully: feel big toe "grip and lift" at toe-off with glute squeeze for smooth propulsion.

Train: big toe dorsiflexion drills, ankle mobs, barefoot progression, wide-toe shoes to restore natural patterning.

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The Pilates Circle is a great tool to help you teach both breathing and spine movement. The using the circle to push and pull helps facilitate rib cage movement and acts as a tactical and visual cue. It's one of my favorite ways to introduce these concepts.