Which GRF component has the smallest peak force during walking?

Which GRF component has the smallest peak force during walking?

• A. Vertical
• B. Anterior-posterior
• C. Sagittal
• D. Medial-lateral

Answer: (D)

During walking, the ground reaction force has three directions: vertical (up and down), anterior-posterior (front-to-back), and medial-lateral (side-to-side). The vertical component must bear the body's weight, so it reaches the highest peaks. The anterior-posterior component reflects braking and propulsion and can be substantial, but still generally smaller than the vertical force. The medial-lateral component is involved mainly in maintaining balance and a stable path, so the side-to-side forces are relatively small. Therefore, the smallest peak force occurs in the medial-lateral component.

During walking, the ground reaction force has three directions: vertical (up and down), anterior-posterior (front-to-back), and medial-lateral (side-to-side). The vertical component must bear the body's weight, so it reaches the highest peaks. The anterior-posterior component reflects braking and propulsion and can be substantial, but still generally smaller than the vertical force. The medial-lateral component is involved mainly in maintaining balance and a stable path, so the side-to-side forces are relatively small. Therefore, the smallest peak force occurs in the medial-lateral component.