What are the normal accepted ranges of motion for calcaneal inversion and eversion?

The accepted normal ranges of motion for calcaneal inversion and eversion indicate a balance in the foot's mobility and stability, which is essential for proper functioning, especially during activities such as walking or running. Inversion refers to the movement of the foot where the sole turns inward, while eversion is the outward turning of the sole.

The range of 10-20 degrees for eversion and 20-30 degrees for inversion aligns with clinical guidelines and research, which suggest that these degrees are essential for optimal foot function. This range allows for sufficient adaptation to uneven surfaces and helps maintain balance during dynamic movements.

Inversion being slightly greater than eversion is physiologically consistent with the function of the subtalar joint and how the foot absorbs impact. Furthermore, adequate inversion and eversion allow for adjustments in gait patterns and contribute to the overall alignment of the lower extremities. The selected answer provides a realistic representation of normal foot motion, crucial for practitioners when assessing restorative strategies for patients experiencing dysfunction in these movements.