- Basic skill acquisition Physical abilities and cognitive skills required for improvement of behaviour in target activities are trained. For example to meet the problem of fear of movement, graded activity, or exposure will be provided. When negative thoughts are recognized the adolescents are taught and trained on how to replace these thoughts, self-efficacy for target activities are increased by carefully selected activities witch allows the adolescent to succeed and by repeated feedback from the physiotherapists. Adequate coping strategies for restoring and sustaining activities are taught and trained. Parents are trained on how to support new behaviours.