Table 2.

Themes and Subthemes Relating to SB Reduction

Theme	Subtheme
Personal motivators	Desire to improve health
	Awareness of SB and monitoring
	Standing fits lifestyle
	Easy to make standing a habit
	Curious about their SB
	Reducing SB is a self-competition
	Notice positive impacts
	Sense of accomplishment
	Enjoy being more active during breaks
Social motivators	Encouragement from others
Environment motivators	Adaptable home or work environment
Program motivators	Activity monitors are a reminder
	Feedback was interesting
	Positive experiences with health coaches
	Goals helpful and appropriate
	Timers/alarms to remind to stand
	Self-log provides accountability
	Workbooks had useful information and ideas
Personal barriers	Health barriers
	Enjoy sedentary activities
	Feel active so do not see sitting as problematic
	Difficulty conceptualizing or applying SB distinct from PA
	Lack of time
	Fatigue
	Sitting habits hard to break
	No incentive to sit less
Social barriers	Inappropriate amount/type of social support
Environment barriers	Unadaptable environment
Program barriers	No accountability for self-logs
	Difficulty with goal setting
	Feedback hard to interpret
	Health coach calls too long
	Intervention too short
	Reminders were agitating or hard to use

Note: PA = physical activity; SB = sedentary behavior.