Table 1

Overview of the measures used

MeasureTopicDescriptionItem number
GPAQ63 64Physical activityThe Global Physical Activity Questionnaire (GPAQ) measures the intensity and duration of physical activity at work, during transport and during leisure time. The data are quantified by a conversion into metabolic equivalent (MET) minutes per week. One MET represents the energy consumption at rest. The GPAQ defines 4 METs for moderate activity and 8 METs for vigorous activity.6516
General informationAuthor-constructed questions about sociodemography, individual backgrounds, self-assessment of endurance and muscle strength.12
SF-866 67Health related quality of lifeThe SF-8 (Short Form Health Survey 8) covers the eight dimensions of SF-36 on the basis of eight questions: physical functioning, role-physical, bodily pain, general health, vitality, social functioning, role-emotional and mental health.8
MotSE,68 adapted to69Motivational self-efficacySelf-efficacy related to the motivation to increase physical activity is estimated on the basis of three items.3
MainSE,68 adapted to69Maintenance self-efficacySelf-efficacy, related to the maintenance of increased everyday activity, is estimated on the basis of three items.3
RecSE,68 adapted to69Recovery self-efficacySelf-efficacy, related to the return to activity after a setback, is estimated on the basis of three items.3
General informationShortened version of the App-External Questionnaire (AppEx): questions about weight, height, endurance and muscle strength, participation in further courses.5
Process evaluationA series of author-constructed questions to assess satisfaction with individual components of the programme and user behaviour. Additional integration of UEQ-S (User Experience Questionnaire Short), which assesses the user-friendliness of a product using eight opposing pairs of characteristics.5
SustainabilityAuthor-constructed questions to assess the use of the exercises and components of the programme after it has been completed.5