Evaluation of a Motorised Prosthetic Knee

Participants will visit the lab 6 times over a period of 5 weeks. The study includes a familiarisation phase (3 measuring moments) followed by the experimental phase (3 measuring moments). During the measuring sessions, participants will perform four tasks with their current prosthesis and with the Power Knee (Össur). The order in which the devices will be tested, will be reversed on each measuring moment to control for possible order effects and fatigue.

The experimental protocol will entail an L-test and slope walking test that will each be performed 3 times, followed by a 6 minutes of hallway walking (6MWT), 10 min rest and a dual-task 6MWT.

The slope walking test assesses the participants' ability to ascend and descend a 6 m long ramp of 10% inclination as fast as possible. For safety reasons bilateral handrails are warranted. Participants start the test in an upright position in front of the ramp and are asked to ascend the ramp, turn around on the platform, descend the ramp and return to the starting position.

The L-test, requires higher physical activity of the user. During the L-test, participants are asked to rise from a chair, walk 7 meters, turn 90 degrees, walk 3 meters, turn 180 degrees and then return in the same way to the seated position. A total distance of 20 meter is covered.

The 6MWT will be performed on a hallway at a self-selected walking speed, which closely relates to the most efficient walking speed.