How much frontal plane range of motion (ROM) does the calcaneus have?

The frontal plane range of motion (ROM) of the calcaneus, which refers to the movement of the heel bone in relation to the lower leg, is typically accepted to be around 20 degrees. This range of motion is crucial for allowing the foot to adapt to uneven surfaces and provides necessary adjustments during activities such as walking and running.

The calcaneus articulates with the talus and the cuboid, enabling it to perform movements such as inversion and eversion, which are essential for maintaining balance and proper gait mechanics. The 20 degrees of frontal plane motion is significant in preventing injury and promoting proper foot mechanics.

Understanding the normal range of motion for the calcaneus is important for orthotic fitters, as deviations from this range may indicate underlying issues that need to be addressed with appropriate interventions or orthotic support.