This single-site, two-arm, parallel-group randomized controlled trial will enroll adults undergoing total knee or hip replacement surgery. Two days after surgery, participants will complete a brief guided mindful breathing practice delivered by text message and will then be randomized to receive either personalized meaning-making questions or implementation-focused questions. The trial will evaluate whether personalized meaning-making questions enhance the clinical effects of the mindfulness practice on acute pain, pain unpleasantness, anxiety, desire for pain medication.