The Health Promotion and Wellness SIG has posted a new blast cast titled Smartphones and Wearable Activity Trackers to Measure and Promote Physical Activity. As physical therapists and physical therapist’s assistants we regularly engage in promoting active lifestyles and assisting patients with physical activity behavior changes. It is important for us to be familiar with the measurement accuracy and effectiveness of popular technology for monitoring physical activity. The goal of this blast cast is to provide readers with contemporary references about: (a) the accuracy of some of the most popular devices and applications for tracking physical activity and (b) how they may be used to promote activity among patients. The blast cast can be found at https://geriatricspt.org/?au9i0h Please direct questions or comments about the blast cast to Gina Pariser, Vice Chair-HPW SIG (gpariser@bellarmine.edu).