 This study evaluated an overground robotic gate trainer that applies synchronized forces on the user's pelvis, known as the Mobile Tethered Pelvic Assist Device, TAPD. The device was used to increase the range of frontal-plane pelvic angles, sagittal plane angles, and transverse plane angles during walking. It also increased the activation of the left gluteus medius muscle, which helps to stabilize the pelvis. The right gluteus medius muscle activation did not significantly differ when frontal-plane moments were applied. This study suggests that the TAPD has the potential to be used in overground robotic gate training strategies to address gate deficiencies or muscle weakness. This article was authored by Danielle M. Strommel, Antonio Prado, Serge Atroy, and others.