Above-knee and below-knee running solutions

Prosthetic options for getting out, staying active, and winning medals

Pure health

Along a beach, over a trail, on the track . . . there’s nothing like the satisfaction of a good workout.

Ottobock’s Fitness prostheses makes it possible to get up and moving again.

Ottobock carbon fiber running feet combined with the 3S80 knee can help you increase strength and mobility while enhancing your overall health and well-being. And, if you’re an athlete in training, this is the prosthesis you need.

Click on the red “hot spots” in the photo to dig deeper into the fitness prosthesis that interests you.

Go to the Advantages for you tab below to learn how a fitness prosthesis can transform how you move.

Take a Fitness Prosthesis Try Out

Runner soles

Two types of soles are available for the Runner. The Runner sole for recreational athletes is considered a classic all-rounder for terrain such as asphalt, gym floors and natural trails. In contrast, the Runner spike sole is primarily geared towards performance-oriented competitive runners due to its good traction on tartan tracks.


The Runner is characterised by a resilient, lightweight carbon spring, which provides runners with a high level of propulsion and enhanced stability when turning corners. By moving the adapter along the carbon spring, the dynamic response and spring stiffness of the running prosthesis can be adapted to the user´s individual needs.

Sport knee joint

It features powerful rotation hydraulics optimised for running sports, tailored to master even high stride rates. The knee joint is available in two versions: 3S80 Sport and 3S80=1 Sport with low-viscosity oil.


The carbon spring foot proves to be very resilient and also provides a high energy return. The sport foot is available in various levels of stiffness and different lower leg lengths according to your individual body weight and size.

Sprinter soles

Two different types of soles can be installed on the carbon spring foot: A universal sole with running shoe tread and a sole with spikes for use on tartan tracks.

What you need to know

Advantages for you

High impact durability

The robust 3S80 Fitness Prosthetic Leg is designed to withstand the wear and tear of any workout level, no matter if you’re an athlete in training or a weekend jogger.

Ready for any terrain

Your options are many, whether you’re on a track or uneven outdoor terrain. Choose the Sprinter Foot level of stiffness and the Fitness Sole tread that match your personal running style.

Security with power

Fast changes in speed are no problem for this leg; it won’t slow you down and still provides a secure foot strike for powerful strides.

Technical info

3S80 Fitness Knee Specifications

Max. body weight - 220 lbs

Weight of prosthesis - 682 g

Max. flexion angle - 135°


Please choose an appropriate format:

Fitness Knee Information brochure

Fitness Knee Information brochure


Take a look at our Frequently Asked Questions for more information.

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