As part of a large exercise physiology laboratory (lab) reform project, we used blended learning to support graduate teaching assistants and lab technicians in developing their pedagogical knowledge and create an entry point to reflective conversations about teaching and learning. Because self-paced asynchronous online modules can enable reflective and self-determined learning, this asynchronous professional development course is punctuated with reflective questions for the instructional team preparing to teach reformed exercise physiology labs. Asynchronous course content was shared via short videos, podcasts, and readings. We debriefed this self-paced, SoTL-informed course together, in-person. This social debriefing kicked off our weekly synchronous reflective conversations about teaching and learning in a community of practice. Developing a shared language for talking about teaching, enabling student learning, practicing effective teaching, and beginning to contemplate teaching philosophies were described by graduate teaching assistants as notable aspects of this blended learning journey. Lab technicians described discovering SoTL and discussing learning challenges as helpful to their teaching. [Articles in this journal were presented at the University of Calgary Conference on Postsecondary Learning and Teaching.]