Table 1.

Excerpt from interview guides with questions related to the activity tracker

Interview	Number	Question
Mid-way	1	How was your experience with using the activity tracker?
6 months after	2	How did you use the activity tracker? (Only during workouts, or also other times? Pulse zones? As a watch?)
6 months after	3	Did the activity tracker motivate you to work out more often? Harder?
6 months after	4	Was there anything special about the activity tracker that made you more motivated?
6 months after	5	What motivated you to wear the activity tracker (for an extended period)?
6 months after	6	Is there anything you wish was possible with the activity tracker, which could have motivated you to wear it longer?