Articulated feet include rubber bumpers that serve which purpose?

• A. Absorb shock and control plantarflexion excursion.
• B. Increase propulsion during gait.
• C. Harden the foot to resist wear.
• D. Allow knee flexion to vary.

Answer: (A)

The key idea is how rubber bumpers in an articulated foot act as shock absorbers and limit ankle motion. When the heel hits the ground, the bumper compresses to damp the impact, reducing the peak forces felt by the residual limb. As you roll onto the foot, the bumper also provides resistance that prevents too much plantarflexion, creating a controlled and smoother rollover into mid-stance and toward toe-off. This damping and movement limitation improves comfort and stability without primarily increasing propulsion, hardening the foot for wear, or changing knee motion.