Background: Disturbances in bodily wellbeing represent one key aspect of psychosocial impairments related to cancer. Therefore, interventions to improve bodily wellbeing in post-treatment cancer patients are important.~Objectives: This project aims at two goals:~Investigators want to evaluate whether bodily disturbances in post-treatment cancer patients can be influenced positively by group BPT (Non-randomized evaluation of a weekly group BPT using a waiting-period comparator).~In addition the efficacy of intermittent smartphone-triggered bodily interventions is assessed with a nested RCT to evaluate short-term efficacy of smartphone-triggered bodily interventions.~Study design: The project follows the outline of a non-randomized evaluation of a weekly group BPT using a waiting-period comparator, with a nested randomized controlled trial (RCT) to evaluate the short-term efficacy of smartphone-triggered bodily interventions.~Study flow:~Participants will first undergo a waiting period (duration at least 6 weeks) followed by the group BPT (6 weekly sessions, 90 minutes each).~During the group BPT, either a smartphone-triggered bodily intervention or a smartphone-triggered control intervention will be provided at random (randomization on a daily basis) over a period of 5 consecutive weeks on 6 days per week. This will result in 15 smartphone-triggered bodily interventions and 15 smartphone-triggered control interventions, which each patient will undergo.~Measurement points: Patients will be surveyed at three points in time (initial consultation, pre- and post-intervention). Standardized questionnaires will be used to measure patients' body disturbances, body image, body mindfulness, physical complaints, quality of life, vitality, mental health, anxiety and depression and to explore the effects of BPT on bodily disturbances and body image in post-treatment cancer patients.
With this project investigators focus on the evaluation whether bodily disturbances in post-treatment cancer patients can be influenced positively by group BPT and if intermittent smartphone-triggered bodily interventions are effective.