Table 3.

Facilitators to adherence to exercise prehabilitation

Theme	Belief Statements	TDF Domain	Total	(%)
The program is manageable and well-suited for older adults with frailty	The program is easy	Beliefs about Capabilities, Environment	15	100%
	There are no specific skills required to complete the prehab program	Skills	13	87%
	The prehab program is well-suited for me	Environment	10	67%
	The program had attainable goals	Goals	5	33%
There are adequate resources to support engagement with the program	The materials (program booklet and video) and weekly calls helped me complete the exercise program	Environment	9	60%
Support from others helps with self-perceived adherence	My family and friend's support helped me complete the prehab program	Social Influences	13	87%
	Exercising with someone else helped with completing the prehab exercise	Social Influences	5	33%
A sense of control, intrinsic value, noticing progress and improving health outcomes	I am able to have an impact on my own care or outcomes as doing the prehab program will have benefits for me down the road	Beliefs about Consequences, Social Professional Role	11	73%
	I am motivated to do the exercises	Goals	6	40%
	Seeing progress and improvement helped me to complete the prehab program	Reinforcement	5	33%
Enjoyable and facilitated by previous experiences	I enjoyed the prehab program	Reinforcement	14	93%
	Having experience with exercise in past helped me complete the prehab program	Skills, Reinforcement	6	40%
A need for individualization and variety	A more individualized program would be helpful to improve the prehab program	Behavioural Regulation	4	27%
	More equipment (i.e. resistance bands at different levels) would improve the prehab program	Behavioural Regulation	4	27%