After the first three months of sensor monitoring, participants not meeting goals will receive an intervention (others will be removed from the study). The intervention assigned is not pre-determined, but will be assigned by an expert panel based on the individual needs determined from the assessment results and monitoring data. The intervention may include prosthetic care, physical therapy, motivational interviewing or other related psychological interventions, or a combination thereof. After three months of intervention, assessments are performed again and if improvement in prosthesis use is determined, participants are monitored for another three months to assess maintenance of prosthesis use (participants showing no improvement are removed from the study before these final three months of monitoring).

Individuals identified as having physical issues (poor prosthesis fit, function, comfort or physical conditioning) will receive prosthetic care and physical therapy. This includes adjusting socket fit, component fit and repair, and in some instances replacement. Rehabilitation strategies include gait and prosthesis use retraining, balance fall-prevention, and range-of-motion training, strengthening, pain management, and activities of daily living training, based on participant-reported mobility goals. Individuals whose prosthesis use is reduced due to psychological issues will be provided with motivational interviewing and other related psychological interventions. During these interventions participant will be asked to set personal goals using a semi-structured interview that explores facilitators and barriers to wearing their prosthesis. If both physical and psychological issues are present, participant may receive both types of interventions simultaneously.

Assesses subject walking speed in meters per second for 10 meters. Subjects will repeat each measure 3 times at their normal self-selected walking speed and 3 times at a fast speed while still able to maintain safety.

The 6 minute walk test is performed as an objective evaluation of functional exercise capacity. The test measures the distance that the patient can walk on a flat, hard surface, indoors, in a period of 6 minutes. The walk test is patient self-paced and assesses the level of functional capacity. Patients are allowed to stop and rest during the test, however, the timer does not stop. If the patient is unable to complete the time, the time stopped is noted and reason for stopping prematurely is recorded.

This test is a standardized 14-item objective measure of postural stability and static balance; it is an established fall predictor in adults. Balance is measured during various tasks on a 5 point scale, ranging from 0-4. "0" indicates the lowest level of function and "4" the highest level of function, with a total possible score of 56. A score of 20 or less indicates a high fall risk.

Assesses subject walking speed in meters per second for 10 meters. Subjects will repeat each measure 3 times at their normal self-selected walking speed and 3 times at a fast speed while still able to maintain safety.

The 6 minute walk test is performed as an objective evaluation of functional exercise capacity. The test measures the distance that the patient can walk on a flat, hard surface, indoors, in a period of 6 minutes. The walk test is patient self-paced and assesses the level of functional capacity. Patients are allowed to stop and rest during the test, however, the timer does not stop. If the patient is unable to complete the time, the time stopped is noted and reason for stopping prematurely is recorded. This test will be administered while wearing a mask to measure oxygen consumption.

The AMP is a tool used to predict the ambulatory potential of lower limb amputees, and measure function post-rehabilitation. It was developed to provide a more objective approach to rating amputees under the various K Classifications. The test can be performed with or without the prosthesis. The test involves activities of transfers, balance and walking. Score is out of 39 with each item scored in the range of 0-2.