Table 1 Eligibility criteria

Primary end users

▪ Aged ≥ 65 years

▪ Ability to speak and comprehend German

Primary end users

RZM / RHF:

▪ Known cybersickness

▪ Uncorrected visual impairment which impairs the person’s ability to interact with the game

RZM:

▪ Everyday Fitness Test [26]

▪ Neurological, cardiorespiratory, psychiatric, or orthopaedic impairments which reduce the person’s capability to follow the instructions or to play the game

▪ Height < 160 cm or > 200 cm according to the specifications of the harness system

RHF:

▪ Functional Ambulation Category ≥ 3 [28]

▪ Weight > 120 kg according to the specifications of the securing system

RZM:

Secondary end users

RZM / RHF:

▪ Employed as a rehabilitation expert at one of the centres

▪ Mini-mental State Examination ≤ 24 [29]

RHF:

▪ Mini-mental State Examination ≤ 21

▪ Uncorrected hearing impairment which impairs the person’s ability to interact with the game

▪ Joint contractures that could limit the person’s ability to use the ExerG

▪ Terminal condition (life expectancy < 12 months)

RZM:

▪Aged ≥ 21 years

▪ Pain (> 5 on Visual Analogue Scale during movement

▪ Fractures/surgical interventions ≤ 6 months

RHF:

▪Experience with geriatric or neurological patients (minimum 6 months)

▪ Epileptic seizure ≤ 6 months

Secondary end users

No exclusion criteria were applied for SEUs