(a).

Intervention component categories	Intervention component modalities	Declared OT role in the sample [ref.]	The roles not specifically assigned to OT in the sample [ref.]
Physical activity (PA)	Interventionist-led	Promoting participation in moderate exercise [36]; assisting participation in exercise supported with VR technology [39, 40]	Promoting participation in PA [28, 29]; providing strengthening exercises at workplace, graduating PA progression [30, 31]; practicing PA in groups [33]; inclusion of feasible, available, assessable, affordable, and likely effective outdoor activities that are time-limited and suitable for evaluation, replication, and implementation into mental health services [35]
	In leisure time/self-managed	Providing access to exercise, e.g., with elastic bands [36] and VR technology [39, 40]; encouraging behavior changes by self-assessment of PA [37]	Encouraging continued strengthening exercises and initiating aerobic exercises at home [30, 31]
Relaxation techniques	Interventionist-led	Practicing progressive muscle relaxation [37]	Use of relaxation techniques [32]
	In leisure time		Encouraging home relaxation practice [32]
Nutrition	Dieting	Encouraging behavior changes by self-assessment of additional fruit and vegetable consumption [37]	Encouraging calorie reduction [28, 29]; composing individual dietary plan based on the Danish dietary recommendations, dietary records, and identification of dietary preferences, using evidence-based guidelines for calorie reductions [30, 31]; using recommendations from the clinical guidelines in treatment of overweight and obesity in adults (USA) and encouraging proper fluid intake [33]
	Meal replacement and meal preparation		In combination with identification of food preferences and ideas to preparation of favorite foods in a healthy way, moving from meal replacement to purchasing food at the grocery store [28, 29]; teaching to move from meal replacements to purchasing food at the grocery store, improving food purchasing habits and meal preparation techniques minimizing the need for extensive menu planning and cooking [33]
	Social eating	Providing healthy meal experience as part of group sessions [36]	Providing experiences in eating together [28, 29] and dining out [33]
Cognitive techniques	CBT elements	Encouraging positive cognition [36]	Using CBT elements in promoting health behavior changes at workplace, encouraging positive thinking [30, 31]
	Coping		Reflecting dysfunctional attitudes and coping behaviors [30, 31]; instructing in coping techniques [32]
	Memory support	Guidance in improving memory function with social support [37]	Teaching compensatory strategies for cognitive impairments [28, 29], i.e., as part of psychiatric rehabilitation strategies [33]
	Motivational support	Guidance in using social support to motivation, listing health benefits and motivational inspiration, repeating affirmations to oneself, and environment modifications [37]; making activity enjoyable [39]; positive role modelling [39]	Using simplification of material, active learning, repetition, flexible methods of presenting information, visual aids and reinforces [33]; improvement of motivation, self-esteem, and sense of belonging [35]
Disease-specific topics		Mood and quality of life monitoring in postsurgical breast cancer survivors [32]	Diabetes management in relation to hypoglycemia, sick days, medication, blood glucose testing, foot care, and psychological issues [38]