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Table 1 Static and dynamic START app features and corresponding BCTs [34]

From: Development and feasibility of a mobile phone application designed to support physically inactive employees to increase walking

Content App feature BCT
Static Setting and adjusting goals, advice on overcoming anticipated barriers, information about planning activities Goal setting behavior (1.1)
Problem solving (1.2)
Action planning (1.4)
  Information on the benefits of walking, injury prevention, frequently asked questions, and tips for making walks more interesting Instruction on how to perform the behavior (4.1)
Information about health consequences (5.1)
Dynamic Encouragement to set and adjust goals Goal setting behavior (1.1)
Self-monitoring tools including request to enter daily step count and record structured walking activities Self-monitoring of behavior (2.3)
Weekly graph displaying progress towards goal Feedback on behavior (2.2)
  Feedback on progress on achieving step goal delivered via messages using need-supportive communication (SDT) Discrepancy between current behavior goal (1.6)
Feedback on behavior (2.2)
  Request to set and adjust goals in light of progress Review behavioral goals (1.5)
Discrepancy between current behavior and goal (1.6)
  Plan weekly walks (when, where, with whom) Action planning (1.4)
Reminder messages linked to self-set plans using need-supportive communication (SDT) Prompts/cues (7.1)
Social reward (10.4)
  Request to rate feelings following structured walks, mid-walk motivational messages based on need-supportive communication (SDT) Social support (practical) (3.2)
Social support (emotional) (3.3)
Monitoring of emotional consequences (5.4)
  Working with group members to achieve a team goal challenge (selected by the team). To achieve this, we pooled total step count for group members and displayed progress of mileage towards a well-known destination, based on group size and fitness level (e.g., walk from Perth to the Melbourne Cricket Ground) Social support unspecified (3.1)
Goal setting outcome (1.3)
Graded tasks (8.7)
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