The Importance of Knowing Your K-Level

Imagine a competitive athlete with amputation who is forced to work out on a prosthesis with a rigid knee. Or an older, more sedentary person using a prosthesis with a "fast" high-performance knee and running foot.

When it comes to prosthetic legs, the component selection needs to be appropriate for the individual and their potential level of functional ability, such as their activity and mobility.

To help determine the ideal prosthetic components for each user, mobility levels have been developed through four classifications known as the "K Levels.“ All prosthetic components are assigned a corresponding K-Level, and based on your personal K-Level, your prosthetist can select the right components for your needs.

Determining your K-Level? 

K-levels are a rating to indicate rehabilitation potential. It indicates a person's potential to use a prosthetic device. 

How do you find your K-Level? Your prosthetist or doctor will consider many factors. These include your age, body weight, physical constitution, level of amputation, blunt features, pain, and whether you have any possible comorbidities . Your level is determined based upon your current needs and your anticipated performance in the future.

Read on to learn more about each K level and how yours is determined.  

How many K-levels are there, and what are the definitions?

K-Level 1: Indoor walker 

With the help of prosthesis, it is possible for a person to manage level walking distances at a fixed cadence. 

K-Level 2: Restricted outdoor walker 

With the help of prosthesis, it is possible for a person to cope with limited walking distances at low walking speeds. The person can navigate low environmental obstacles such as curbs, steps and uneven floors. 

K-Level 3: Unrestricted outdoor walker 

With the help of prosthesis, it is possible to move freely on different types of terrain. The person may walk or have the potential to walk at varying speeds and be able to handle most environmental obstacles. They may be able to pursue therapeutic, occupational, recreational or exercise activities without overstressing their prosthesis. 

K-Level 4: Outdoor walkers with particularly high requirements 

With the help of the prosthesis, the person can move without restriction, including tolerating high-impact, stress or energy levels. Walking time and walking distance are unlimited. The prosthesis is capable of fulfilling the typical needs of a child, active adult, or athlete.