Apparatus for transcutaneous electrical nerve stimulation in a user, the apparatus comprising: a housing； an application unit for providing mechanical coupling between the housing and the user's body； a stimulation unit mounted to the housing for electrically stimulating at least one nerve with at least one stimulation pulse during a therapy session； and a determination unit mounted to the housing and configured to perform at least one of: (i) determining an activity level of the user； (ii) determining a gait characteristic of the user； (iii) determining a balance function of the user； and (iv) determining apparatus placement position on the user.
