What is the location of the ground reaction force during terminal stance?

During terminal stance, the ground reaction force (GRF) is primarily located anterior to the ankle and knee joints while being posterior to the hip joint. This positioning of the GRF plays a critical role in providing stability and facilitating forward progression during walking.

In this phase, the body is transitioning into the next step. The center of mass must move forward over the supporting leg, requiring the GRF to act in a manner that allows the body to maintain balance and prepare for the swing phase. The force's location helps propel the body forward while also counterbalancing the forces generated by the downward motion of the center of mass. The location of the GRF being anterior to the ankle and knee aids in extending these joints, while being posterior to the hip prevents excessive forward lean and aids in hip stabilization.

This understanding of the GRF's location during terminal stance is important for the design of orthotic devices, rehabilitation strategies, and gait analysis as it relates to optimizing walking efficiency and reducing the risk of falls or other gait-related issues.