My husband had a co-worker who recently retired. His co-worker had some mobility problems that made it very difficult for them to walk. Crutches and canes did not help that much and a wheel chair was really not called for. What the person had was a knee walker. What is a knee walker? Well it allows a person who has had a lower leg injury (below the knee), or an illness that caused them to not have the strength to stand mobility. By putting the knee on the knee walker the person could push himself or herself along. My husband’s co-work did quite well using hers.