Dynamic adaptationIntrinsic control firmware analyzes ankle joint torque and angle data from high-resolution sensors in real time to mimic the patient's physiological ankle function.

Ankle displayThe power button and battery display are easy for the patient to access.

Lithium-polymer batteryThe integrated battery lasts for up to 8 hours depending on user activity. The dual bay charger can charge two batteries simultane-ously in as little as 90 minutes.

Powered propulsionA battery-powered, motorized actuator coupled with a high-energy spring provide powered propulsion that emulates the gastrocnemius and soleus muscles.

Weather sealed componentsThe ankle is resistant to rain, snow, and dirt to withstand the varied demands of everyday life.

360° top cap accessThe pyramid adapter enables a quick and easy fitting.

1A1-1 Empower™ MP FootThe Empower replaces the function and power of lost muscles and tendons, giving users energy rather than taking it away – even up ramps, hills, and stairs. Its powered propulsion drives the user forward and upward while smoothly transitioning weight to the remaining limb. The Empower provides the required amount of energy needed for each step, enabling users to cope effortlessly with longer distances, stairs, and sloping terrain.

Technical data

Article number 1A1-1

Suitable for K3

Amputation level TT, KD, TF

Maximum body weight 287 lbs (130 kg)

Sizes 25 – 30 cm

Weight* approx. 4.25 lbs (1928 g) (without footshell)approx. 4.75 lbs (2,200 g) (with footshell)

Minimum clearance* 8 3/4 in (222 mm)

* Based on size 28

Components & Accessories

Footshell incl. spectra sock

Empower incl. set of heel wedges

Battery Charger incl. power supply and power cord

Tuning device

Reclaim your power.Power• Emulates the function and power of lost muscles and tendons 1, 2

• Provides energy instead of taking it away, even up ramps, hills, and stairs 1, 6

Control• Lifelike ankle movement that normalizes user’s walking gait 4

• Reduces joint forces that may result in less pain and fewer long-term orthopedic problems 1, 2, 5, 6

Stability• Adjusts ankle power, resistance, and flexion in real-time• Provides balance on variable terrain 3

1. Herr H., Grabowski A. (2012): Bionic ankle-foot prosthesis normalizes walking gait for persons with leg amputation, Proc Biol Sci. Vol. 7, 279(1728): 457–464.2. Ferris A., Aldridge J., Sturdy J., Wilken J. (2011): Evaluation of the Biomimetic Properties of a New Powered Ankle- Foot Prosthetic System, Dept. of Orthopedics and Rehabilitation, Center for the

Intrepid, Brooke Army Medical Center, Fort Sam Houston, TX, USA. Presented at American Society of Biomechanics.3. Gates D., Aldridge J., Wilken J. (2013): Kinematic comparison of walking on uneven ground using powered and unpowered prostheses, Clinical Biomechanics, 28, 467–472.4. Aldridge J., Ferris F., Sturdy J., Wilken J. (2012): Stair ascent Kinematics and Kinetics with a Powered Lower Leg

System Following Transtibial Amputation, Gait & Posture, Vol. 36, 291–295.5. Grabowski A., D’Andrea S. (2013): Effects of a powered ankle-foot prosthesis on kinetic loading of the unaffected leg during level-ground walking, Neuroeng Rehabil., 10:49.6. Esposito E., et al. (2015): Step-to-step transition work during level and inclined walking using passive and powered ankle-foot prostheses, Prosthet Orthot Int.

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