relief of knee flexion contracture and gait improvement following adaptive training for an assist device in a transtibial amputee a case study background management of a knee contracture is important for regaining gait ability in transtibial amputees however there has been little study of prosthesis training for enhancing mobility and improving range of motion in cases of restricted knee extensionobjective this study aimed to evaluate the effects of adaptive training for an assist device atad for a transtibial amputee with a knee flexion contracture kfc a male transtibial amputee with kfc performed 4 months of atad with a multidisciplinary team during the atad the passive range of motion prom in the knee amputee mobility predictor amp assessment center of pressure cop on a force plateequipped treadmill gait features determined by threedimensional motion analysis and shortform 36 item health survey sf36 scores were evaluatedresults following atad prom showed immediate improvement 1356 24 at baseline 1425 17 at step 1 1521 18 at step 2 1658 19 at step 3 and 1660 14 at step 4 this was followed by an enhanced cop gradually gait features also improved additionally the amp score 5 at baseline to 29 at step 4 and klevel k0 at baseline to k3 at step 4 increased after atad along with these improvements the sf36 score also improvedconclusions atad could be beneficial for transtibial amputees by relieving knee contractures and improving gait