Exploring Breaks in Sedentary Behavior of Older Adults Immediately After Receiving Personalized Haptic Feedback: Intervention Study., Compernolle, Sofie, Van Dyck Delfien, Cardon Greet, and Brondeel Ruben , JMIR Mhealth Uhealth, 2021 05 10, Volume 9, Issue 5, (2021)