159 patients scheduled for total knee or total hip arthroplasty were randomized to patient education via an automated text messaging service (StreaMD; SMS bot group) or standard preoperative clinic appointment and perioperative instructions (control group). The purpose of this study was to determine if the SMS bot group demonstrated greater daily postoperative exercise compared to the control group over the first 6 weeks after surgery. Results demonstrated a statistically significant longer duration of daily exercise in the SMS bot group compared to the control group. In addition, significant differences in favour of the SMS bot group were observed in time to cessation of narcotic use, mood scores, calls placed to the surgeon's office in the postoperative period, and perception of motivation and satisfaction with the received intervention.