Powered Arm Prosthetics Competition

General Rules

Pilots with forearm or upper arm amputations will be equipped with actuated exoprosthetic devices and will have to successfully complete two hand-arm task courses as quickly as possible. A close-up camera view will be used to life-display the shoot on the stadium screens. At least two participants will start at the same time on two identical courses, to make the event more exciting. The loosing pilot will not drop out of the race, because rank and time will be used to determine the winner of this discipline. The two courses will be explained in the following.

neu_arm                                                                                                   D’Arc. Studio Associates Architects

A. Wire Loop Course


  • During the game each pilot will hold a conductive wire loop with which he or she will be asked to follow a metal wire (blue) with a loop without touching the wire.
  • The wire loop will be connected to a handle that will allow grasping it properly with a power grip.
  • Three different sections of the metal wire will be there. Each section will differ in its complexity and cause different requirements to the movement.
  • Each part of the section will start and end on a non-conductive safe region (the red positions), where the pilot will grasp a new loop to continue on the new section.
  • Each section will have its own wire loop at the starting safe region that will have to be grasped.
  • Intermediate non-conductive parts will allow having a break or change the grip (grey).
  • In case of a contact between the loop and the wire, there will be an acoustic signal, indicating, that this section has to be restarted from the safe region (red), or the previous breaking point (grey). The acoustic sound will be accompanied with visual effects on the stadium screens, to make it exciting for the audience.
  • Cushioned ground will be used allowing the pilots to kneel when necessary.



Game Rules

  • The goal is to finish the whole course as quick as possible. The overall winner will be determined by the ranking among the participating pilots. Time will be measured and scored and used as secondary information, if ranking alone leads to a tie.
  • Two pilots will start at the same time on two identical loop-wire-games, to make the event more exciting.
  • The course has to be performed with the arm that carries the prosthesis. The other arm can be used to support the task.
  • The height of the wire will be adjusted to the individual pilot’s body height.



B. SHAP Course ADL

  • This course is based on the Southampton Hand Assessment Procedure (SHAP), which incorporates different object shapes and sizes that require the use of different grips (spherical, tripod, power, lateral, tip, extension), see http://www.shap.ecs.soton.ac.uk/about-usage.php
  • Different objects will be placed on a long table and the pilots will have to use each of them in order to reach the next object. All objects and tasks refer to typical activities of daily living (ADL).
  • Optionally, a round table could be used to see the actions from all sides.
  • Optionally, using typical Swiss items, as cutting a Wurst, opening an Ovomaltine glass, pinch gripping a Zweifel potato chip etc. (as long as it fulfills the SHAP criteria).


Game Rules:

  • The goal of this course is to solve the subtasks subsequently  and as fast as possible.
  • When the task is not performed correctly, a simple, but time consuming penalty task will have to be performed.
  • In contrast to the SHAP test, where the time is stopped after each single object, here the time will be stopped after solving all the subtasks.
  • At least two pilots will start at the same time on two identical parallel sets of ADL objects, to make the event more exciting for the audience. But there will not be a k.o. principle (see also loop-wire-game).
  • An object can be skipped but this will require the pilot to perform a simple but time consuming penalty task (e.g. certain number of penalty objects can be arranged that the pilot needs to grasp, move and drop).

Inclusion Criteria for the Pilots

Participating pilots must fulfill the following inclusion criteria

  • Pilots have a forearm amputation
  • The pilots must be at least 18 years old
  • Pilots with an upper arm (transhumeral) amputation or shoulder disarticulation will not be excluded. They are allowed to compete against the pilots with forearm amputations, although they might have a disadvantage. If there will be a large number of applicants, a separate sub-discipline will be established.
  • Also pilots with amputations of both arms will be allowed to participate.

Inclusion Criteria for the Technology

The following criteria should apply for the powered prosthesis technology:

  • The prosthetic device used in this course is allowed to have any number of actively driven (powered) joint, e.g. for wrist or hand opening/closing or wrist pronation/supination. They can have several passive or mechanically coupled joints, e.g. at the fingers. Also cable driven body powered systems are allowed.
  • To access sensory or motor nerves, also surface or implanted electrode systems can be used. To ensure that technology is safe, that safety standards are met and that any health risks are avoided,  participating teams must have expert approval (e.g. CE, FDA) or an approval from a clinical expert if it is a development technology.
  • During the whole duration of the course, participants will have to carry all components (batteries, control units, etc.) or the components will be integrated in the prosthesis.
  • Combustion engines will not be allowed.
  • Limitation of the weight will not be necessary as performance decreases with increasing weight.
  • The system will have to be completely autonomous, i.e. communication (wired or wireless) between the device and some stationary site is not allowed.
  • The pilot’s team must fulfill predetermined safety criteria about the technology that is going to be used during the race. The participating pilot and team must commit to the rules and inclusion/exclusion criteria of the device and prove technical function and safety prior to the race by submitting photographs with longshots and clear close-up views, videos, certification of local boards, risk analysis etc.