We assessed the effects of the intervention on body composition (primary outcome measure), as well as on behaviour, behavioural determinants, and aerobic fitness (secondary outcome measures).
We evaluated the intervention with regard to effects on body composition (primary outcome measure), behaviour, behavioural determinants, and aerobic fitness (secondary outcome measures).
Cohort analyses will be reported separately and will test causal pathways between behavioural determinants, behaviour change and consequences of behaviour change.
To determine the effectiveness of our program, we examined body composition, behaviour and behavioural determinants, and aerobic fitness.
The main outcome measures are compliance to the PA guidelines, time spent in PA and specific sub-behaviours and behavioural determinants.
Measurements are performed at baseline and after 12 and 18 months and cover quality of life, cardio-metabolic risk factors (e.g. glucose tolerance, serum lipids, body fatness, and blood pressure), eating and physical activity behaviour, and behavioural determinants.
In an attempt to uncover the socio-ecologic breadth of sedentary behaviours and its behavioural determinants [ 6], we explored the association with perceptions towards physical activity.
(economic evaluation) For this study, a logic model of change is composed to link intervention activities, their mechanisms of change (i.e. behavioural determinants), expected behaviours, and intervention outcomes in a logical order.
Therefore, effects of the interventions on behavioural determinants, on PA behaviour and mediation of intervention effects by targeted determinants will be studied.
In the first step of the IM protocol (needs assessment), the health problem is analysed, followed by an exploration of related behaviours, environmental factors, and behavioural determinants [ 23].
Furthermore, knowledge was selected as a determinant, as it is a prerequisite for instigating behaviour change and other behavioural determinants including attitude, subjective norm and perceived behavioural control [ 23, 60– 60].
