2. Methodology

In both case studies method triangulation was used as the foundation of the study designs, including a quantifying positivistic approach to measure changes in clinical symptoms as a result of the interventions, combined with a qualitative humanistic approach used to gain an understanding of the cases’ subjective experiences of the interventions. The quantitative data was gathered through clinical examination and questionnaires, and the qualitative understanding was gathered through the use of semi-structured interviews. Because of the volatile symptoms of PCS, the interventions were designed as a cyclical process with the intention of including cases by listening to their feedback and adjusting protocols, if necessary, based on any potentially adverse reactions. This design was inspired by Malterud’s research spiral which is based on a continuous evaluation and defining of the problem and intervention, thus preparing researchers to be adaptable and increase transferability to the rehabilitation.40,41