Intervention
Overall, the intervention comprised 8 videos, each about 10 to a maximum of 30 minutes in length. The structure of all units was similar. Each sequence started with imparting knowledge on the respective topic. There was both an explanation of the backgrounds and meanings of the respective symptoms and assistance using elements of different psycho-oncological tools in order to be able to manage symptoms. The psychoeducation was supported in each case by text slides and illustrations. Yoga, relaxation, or Qigong exercises were implemented at the end of each video. Two ACT core processes (ie, contact with the present moment and defusion) are addressed through parts of the education and exercises in specific video sequences. An experienced psycho-oncologists/psychotherapist who is also a certified yoga teacher performed the video intervention (7 out of 8 sequences). The Qigong sequence was administered by an experienced psycho-oncologist/psychotherapist who is also a qualified Qigong instructor. The yoga exercises were already evaluated in previous trials.Video Sequences.The participants were given access to a website, on which 2 video sequences were provided weekly for 4 weeks. The patients could watch them via desktop/laptop or tablet as often as they wanted and save the videos and a summary of the exercises. Participants were notified by email each time new videos were available. Technical problems could be announced to an assistant, but problems were rare.