Biomechanics Movement Summit

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The Role of Yaw Movement and Achilles Strain Prevention

Yaw of the Big Toe and 1st Metatarsal
Yaw refers to the rotational movement of the big toe and 1st metatarsal around a vertical axis. This rotation allows the big toe and metatarsal to pivot side-to-side, helping adjust the foot's position during movement. Proper yawing enhances balance and distributes pressure, preventing issues like bunions.

What it looks like when you don't yaw your big toe out


Achilles Strain and Foot Mechanics
Achilles strain can result from improper foot alignment when pressing down on the big toe and lifting the heel simultaneously. To prevent strain, the calcaneus should pitch down while yawing. This coordinated movement reduces the load on the Achilles tendon and spreads pressure across the foot, involving other structures like the plantar fascia.

Conclusion
Understanding the yaw movement in the big toe and metatarsal, along with proper calcaneus mechanics, is crucial for preventing Achilles strain and optimizing foot function.