Ankle Dorsiflexion
With the inside palm of your hand against the ball of the foot, palpate STJ neutral with your outside hand. Raise and lower the fibula into a horizontal position using an angle finder to establish zero.

Dorsiflex the foot at the ankle until the lateral column reaches 90°. This is the starting point for measurement. Relocate the angle finder along the lateral margin of the calcaneus, against the plantar surface, in the sagital plane. Continue passive dorsiflexion to end range of motion while maintaining neutral.

Observe how far past 90° the ankle angle measures into maximum dorsiflexion. Determine the difference between zero and end range dorsiflexion in degrees, report which threshold is achieved.