Table 3 Selection, recruitment, and characteristics of stakeholders (n = 30)

Clinical staff at mental health outpatient clinic

Professional experience from working with young adults with SSD

Personal email to team leader at two outpatient clinics who distributed the invitation all staff at the outpatient clinic.

Conference rooms, outpatient clinics

Two groups:

(N = 4, N = 5)

3 men and 6 women

Nurses (n = 3), social workers (n = 4), occupational therapists (n = 2)

2–30 years’ experience working in mental health

1–16 years’ experience working in an outpatient mental health clinic

Young adults with SSD

Lived experience of having a SSD diagnosis (F20–29)*

Treated at an outpatient mental health clinic and diagnosed with SSD

Email invitation distributed by peer-board coordinator

Conference room, University of Copenhagen

One group:

(N = 4)

2 men, 2 women

Full-time (n = 1), between jobs (n = 1), student (n = 2)

2–17 years in diagnosed with SSD

Relatives of individuals with SSD

Lived experience of being a relative to an individual with SSD

Email invitation distributed by a manager of an outpatient clinic

Conference room, University College of Northern Denmark, Aalborg

One relative participated via a Microsoft Teams due to COVID-19

One group:

(N = 4)

Mothers of individuals with SSD

Work in healthcare (nurse, occupational therapist, healthcare worker, physician)

Tine since children’s diagnosis 1.5–4 years

Physiotherapists working in mental health centres

Experience working with physical activity and exercise for people SSD

Personal invitation to team leader at a department of physiotherapy, who distributed the invitation to all physiotherapist at the department.

Conference room, mental health services, Capital Region of Denmark

One group:

(N = 4)

4 Women

Educated from 1993–2019, 1.5–25 years’ experience working in the psychiatric field

Exercise instructors with/without experience in coaching people with SSD

At least two years’ experience working as exercise instructor and/or experience with coaching people with SSD

Personal email to exercise instructors coaching people with SSD as part of previous feasibility study**

Email invitation distributed by fitness chain

For geographical reasons Microsoft Teams was used

One group:

(N = 9)

6 men, 3 women

Previous experience coaching people with SSD (n = 3), no experience (n = 6), student (n = 4), full-time personal trainer (n = 2)

2–8 years’ experience as an exercise instructor