What type of moment is maximal at the ankle during heel off?

During the heel-off phase of the gait cycle, maximal moments at the ankle joint are critical for understanding functional biomechanics. At this stage, the foot transitions from the flat placement (midstance) to propulsion through the forefoot.

The dorsiflexion moment represents the demand placed on the ankle as the body weight shifts forward and the heel begins to lift off the ground. This moment is necessary for ensuring that the tibia can progress over the foot without causing instability or collapse of the foot.

As the heel lifts, ankle dorsiflexors, primarily the anterior tibialis, are activated to control this forward progression and prevent excessive plantarflexion. In this context, the dorsiflexion moment is critical as it assists in controlling the ankle during the transition from loading to push-off, thereby facilitating an effective and efficient step.

Understanding the role of the dorsiflexion moment during heel-off emphasizes the importance of ankle mechanics in gait dynamics and the need for strength and coordination in the dorsiflexors to support proper ambulation.