Subtalar
From neutral position of the subtalar joint, there should be 20° of calcaneal inversion with passive open chain supination.

From neutral position of the subtalar joint, there should be 10° of passive open chain calcaneal eversion with pronation.

The subtalar joint is Within Normal Limits if there is 30° total range of motion, fully inverted to fully everted. It is Loose if it has greater than 30° total range of motion or greater than 10° eversion. It is Restricted if it has less than 5° eversion with pronation or less than 15° total range of motion (passive end range pronation to end range supination).