Table 1.

Applied behavior change techniques.

BCT (V1 Number)	Definition
Goal setting (behavior) (1.1)	Set or agree on (a) behavioral goal(s) that leads to increased PA.
Problem solving (1.2)	Analyze, or prompt the person to analyze factors influencing PA and generate or select strategies to overcome barriers and/or increase facilitators.
Action planning (1.4)	Prompt detailed planning of PA (must include at least one of context, frequency, duration and intensity). Context may be environmental (physical or social) or internal (physical, emotional or cognitive).
Review of behavioral goal(s) (1.5)	Review PA goal(s) jointly with the person and consider modifying goal(s). This may lead to re-setting the same goal, a small change in that goal, or setting a new goal instead of (or in addition to) the first, or no change.
Feedback on behavior (2.2)	Give informative or evaluative feedback on monitored (including self-monitored) PA.
Self-monitoring of behavior (2.3)	Prompt self-monitoring and recording of PA (i.e., diary).
Social support (3.1)	Advise on, arrange or provide social support (e.g., from friends, relatives, colleagues, buddies or staff). This may include practical help (3.2) and emotional support (3.3)
Instruction on how to perform the behavior (4.1)	Teach skills and knowledge required for specific physical activities, i.e., give clear instructions.
Information about health consequences (5.1)	Provide information about health consequences of physical inactivity (PA).
Behavior practice/rehearsal (8.1)	Prompt practice or rehearsal of the PA one or more times in a context or at a time when the performance may not be necessary, in order to increase habit and skill.

Definitions derived from Michie et al. [21]. PA = physical activity. BCT = behavior change technique.