Table 2.

Strategies used in the self-efficacy-enhancing intervention

Performance accomplishments	Identifying the obstacles to keeping participants active through discussion
	Setting achievable goals and actions, e.g., achieving 10 min of exercise following the exercise video daily before increasing gradually to 30 min
	Negotiating techniques with participants to achieve bigger goals, e.g., set alarm on phone for activity; put notes on doors, the refrigerator, or the television to be active; stand or walk rather than sitting in add breaks
	Monitoring physical activity diary and gestational weight gain on WeChat notes
	Planning for decreasing sedentary behavior
	Providing positive feedback for participants’ accomplishments
	Providing booklet to reinforce knowledge
Vicarious experience	Checking behavioral tracking, review, and feedback on goals; “we’re going to check how you went with your physical activity and tracking and work together to set a healthy activity goal.”
	Sharing self-management strategies from successful pregnant women
Verbal persuasion	Discussing and providing information about consequences of physical inactivity and unhealthy gestational weight gain
	Confirming participants have the capability for exercise and weight self-management
	Informing that one’s own behavior may be an example to others, i.e., inform the participants that if they do physical activity, that may be a good example for their friends and family members.
	Guiding participants to recall previous successful behavior-change situations, discuss context and factors associated with success
	Providing positive feedback for the participant’s effort
Physiological states	Assessing and explaining the participant’s pregnancy-related symptoms and negative emotions
	Discussing strategies for managing symptoms, anxiety, or depression, such as positive self-talk and muscle relaxation