Table 3.

Emerging facilitators and barriers participants felt impacted their ability to adhere to intervention guidelines for diet and/or activity behaviors

Level	Theme	Facilitators		Barriers
		Definition	Main codes (tertiary codes)	Definition	Main codes (tertiary codes)
Individual	Attitudes	Expressing a positive opinion of the intervention or behavioral guidelines within it	Desire for knowledge, positive initial mindset, changes in self-perception, Paid for it	Expressing a negative opinion of the intervention or behavioral guidelines within it	Negative self-perception, competing priorities (work outside the home, work inside the home, life events, inner food cues), feeling over-whelmed, unwilling to change
	Concern for health	Intervention provided a means for a participant to take control of their health for the better	Current health, Avoiding future diagnosis	Concern for or presence of physical and mental complications to changing behaviors	Physical state, Feeling low
	Physical changes	Positive view of physical changes or abilities with intervention adherence	Body shape, brain-body connections (vitality, satiety)	Over emphasis or expectations on changes in body shape	Focus on weight
Environment	Social support	Physical, practical and emotional support from others for behavioral change or maintenance	Within the intervention, within the home, outside of the home (at work, peers)	Lack of physical, practical and emotional support from others for behavioral change or maintenance	Within the intervention, within the home, outside of the home (at work, peers)
	Social accountability	Maintaining behavioral adherence based on internalized pressure or accountability towards other people	Participation guilt, being a role model, changing for others	Difficulty overcoming traditional norms or expectations on diet and/or PA activities around other people	Opposing social norms
	Changeable community aspects	Presence of infrastructure and physical spaces with the community that support adherence and can be targeted through interventions or policy	Built environment	Lacking infrastructure or physical spaces with the community that facilitate practice of new diet or activity behaviors that can be targeted by interventions or policy	Built environment, cost,
	Unchangeable community aspects	Factors unique to a community that are not changeable by individuals that facilitate adherence	Weather	Factors unique to a community that are not changeable by individuals that hinder adherence	Weather
Intervention	Delivery and design	Positive opinions on the methods, physical spaces and delivery platforms used within an intervention that fostered adherence	Nearby location, inclusive spaces, flexible delivery routes, opportunities for social support (with peers, with professionals), support after the intervention period	Negative opinions on the methods, physical spaces and delivery platforms used within an intervention that hindered adherence	Far away sites, opportunities for stigma, one size fits all, limited social engagement (with participants), Intervention reliance
	Content	Opinions on aspects of intervention information and how it was portrayed that supported diet or activity adherence	Perceived credibility, lifestyle management, clarity in messaging, tailoring	Opinions on aspects of intervention information and how it was portrayed that hindered diet or activity adherence	Distrust, lack of tailoring, lack of activity information, unclear messaging
	Fostering self-regulation (BCT)	Active ingredients within the intervention that fostered engagement and gain of self-regulatory skills	Feedback and monitoring (self-monitoring, professional monitoring), demonstrations, forming habits, tangible rewards, goals and planning (goal setting, planning ahead)

BCT Behavior change taxonomies