Train to sustain: A randomised controlled trial evaluation of a vitality training employing behaviour-change techniques.

The intervention was a vitality training employing scientifically-tested behaviour-change techniques. The intervention consisted of five two-hour group sessions that were performed in-house, on the organisations’ premises, which were held fortnightly over a nine-week period. A maximum of 12 participants could participate in a group session. The sessions included the following topics: 1. Personal energy balance analysis; 2. Physical and mental energy; 3. Working from qualities, values, and goals; 4. Personal vitality strategy; and 5. Evaluation and maintenance. The vitality training employed a specially designed ‘method’, which required that participants worked through assignments employing evidence-based behaviour-change techniques, including self-persuasion, implementation intentions, and self-efficacy techniques. This approach allowed participants to identify their own areas of concern, to set a limited number of personally relevant and meaningful goals, and to develop personalised strategies for change. The intervention was delivered by the (independent) developer of the training, who holds a PhD in clinical psychology and works as a researcher, university lecturer, and vitality trainer. Session content was delivered via workbooks; that is, participants completed assignments in their workbooks individually, following instructions from the trainer, and then a short group discussion took place after each assignment. Halfway through each 2-hour session there was a short 10-minute break. Adherence to the intervention method was controlled for, across sessions and participant groups, using a checklist, which was reviewed following each session. During the maintenance phase, the intervention group was not required to complete any activities nor were they contacted by the trainer. The duration of the maintenance phase was approximately 3 months after the completion of the final group session.