What is the primary purpose of a medial rearfoot post on an orthotic?

The primary purpose of a medial rearfoot post on an orthotic is to enhance overall foot function by stabilizing the foot and addressing excessive pronation. By applying a medial rearfoot post, the orthotic can effectively increase the stability of the foot. This is crucial for individuals who exhibit over-pronation, as it helps to realign the subtalar joint and creates a more neutral foot position during weight-bearing activities.

Additionally, the medial rearfoot post is designed to decrease both the amount and the rate of pronation. This means it not only reduces how far the foot rolls inward but also lessens the speed at which this movement occurs. This is particularly important in preventing injuries and maintaining proper biomechanical function throughout the lower extremity during activities such as walking and running.

Since all these effects play a significant role in providing support and stability to the foot, the inclusion of options that mention increasing stability, as well as decreasing the amount and rate of pronation, collectively summarize the comprehensive benefits of using a medial rearfoot post on an orthotic. Hence, the correct choice encompasses the entirety of these functions, making “all of the above” the most accurate answer.