Participants randomized to this arm will receive a brief, text-message-delivered mindfulness intervention two days after total knee or hip replacement surgery. The intervention consists of a 5-minute guided mindful breathing practice that begins with visually paced breathing and then transitions to audio-guided mindful awareness of the breath. Immediately afterward, participants will answer personalized meaning-making questions designed to help them reflect on what stood out during the practice and how that experience related to their pain, relaxation, or coping.

Single item assessing pain unpleasantness ("How unpleasant is your pain?") scored on an 11-point (0=Not unpleasant, 10=The most unpleasant pain imaginable) numeric rating scale. Higher scores indicate greater pain unpleasantness.

Single item assessing pain intensity ("How much pain do you have?") scored on an 11-point (0=No pain, 10=Pain as bad as you can imagine) numeric rating scale. Higher scores indicate greater pain intensity.

The PROMIS physical functioning computer assisted test draws from a bank of 123 items all scored on a 5 point Likert scale. T-Score distributions are standardized such that a 50 represents the average (mean) for the US general population, and the standard deviation around that mean is 10 points. A high score reflects better physical functioning.