Can an Action-based Help-sheet Help People to Move More and Sit Less.

Implementation intentions support people to turn intentions into action, and "Volitional Help-Sheets" are a tool which helps people to form implementation intentions. The study will recruit participants from secondary and tertiary mental health services. The participants will be randomised to one of two groups. Participants in Group 1, the control group, will receive the Volitional Help-Sheet (psychoeducational self-help sheet) but not form implementation intentions. Participants in Group 2, the experimental condition, will use the Volitional Help-Sheet to form implementation intentions. Participants will then complete an acceptability and feasibility measure. At follow up, participants will repeat baseline measures. The feasibility and acceptability of using a Volitional Help-Sheet to form implementation intentions to help people using secondary and tertiary care mental health services to reduce sedentary behaviour will be evaluated.

Introduction: Sedentary behaviour is risk factor for developing many health conditions. People with mental health difficulties can be more sedentary and live 10 years fewer than other populations. Implementation intentions support people to turn intentions into action, and Volitional Help-Sheets are a tool which helps people to form implementation intentions, by identifying critical situations and linking these to potential solutions. The feasibility and acceptability of using a Volitional Help-Sheet to help people using secondary and tertiary care mental health services to reduce sedentary behaviour will be evaluated. If Volitional Help-Sheets are feasible and acceptable to use in this population, this will justify further research in this area, as improving physical and psychological health could increase life expectancy.

Design: The study includes two timepoints: baseline and follow up (four weeks post baseline). Participant characteristics/demographics collected at baseline. At both baseline and follow up, all participants will be asked to complete measures of sedentary behaviour, physical activity, well-being, motivation and mental health. Participants will be randomised to one of two groups. Participants in Group 1, the control group, will receive the Volitional Help-Sheet as a psychoeducational self-help sheet, but not form implementation intentions. Participants in Group 2, the experimental condition, will use the Volitional Help-Sheet to form implementation intentions. Participants will then complete an acceptability and feasibility measure. At follow up, participants will repeat baseline measures.

Sample size: Participants will be current service users, recruited from NHS based secondary and tertiary care mental health services. The recruitment of a minimum of 24 participants and a maximum of 32 participants would be considered a feasible two-armed study.

Recruitment: Adults: 18years+, motivated to decrease sedentary behaviour (demonstrated by choosing to make contact with the researcher to indicate an interest in participation in the study), has capacity to consent to study, currently receiving support from any secondary or tertiary care mental health service and English language ability sufficient to be able to meet the requirements of the study.

Procedure: Recruitment posters will be displayed in clinical areas as part of recruitment. Care teams can advise interested participants on how to contact the researcher and support this if required. Participant information sheets will be disseminated to interested parties. Where a service user has informed the researcher of their interest in participating in the study, they will be offered a detailed participant information sheet and consent to contact forms outlining the study, the expected benefits and commitment required, and informed consent forms. Interested participants will be assessed for capacity to consent and eligibility and will begin the randomisation procedure upon booking the baseline assessment appointment. All members of the research team have experience of obtaining informed consent in research and clinical roles.

Participants will be block randomised (sampling without replacement) in blocks of four and stratified according to clinical service using an online program, into either a control group (group 1) or an experimental arm (group 2). Participants in Group 1 (control arm) will receive a Volitional Help-Sheet with an instruction to tick all situations in which they are tempted not to be active, and tick all solutions to overcome these. Participants in Group 2 (experimental arm) will use the Volitional Help-Sheet to form implementation intentions by linking situations in which they are tempted not to be physically active, with solutions to overcome these. Researchers will be unblinded, however the participants and those external to the research team where involved will remain blind to the group allocated.

Outcomes and analysis: The main study hypothesis is that forming implementation intentions using the Volitional Help-Sheet will be considered acceptable to the participants involved in the study, and that forming implementation intentions using the Volitional Help-Sheet will be considered feasible to use within a diverse range of NHS settings. An exploratory hypothesis is also that the increase in activity will be significantly greater in the treatment group than the control group. Quantitative analysis will be used to evaluate the feasibility and acceptability of using a Volitional Help-Sheet to help people using secondary and tertiary care mental health services to form implementation intentions, with the aim of a reduction in sedentary behaviour.

Eligibility Criteria:
Inclusion Criteria:

* 18+ years old
* Motivated to decrease sedentary behaviour (demonstrated by choosing to make contact with the researcher to indicate an interest in participation in the study
* Has capacity to consent to study
* Currently receiving support from any secondary or tertiary care mental health service
* English language ability sufficient to be able to meet the requirements of the study

Participants will not be recruited on the basis of an assumption that they are sedentary, and participants must demonstrate a desire to increase their sedentary behaviour as indicated by choosing to make contact with the researcher to indicate an interest in participation in the study.

Exclusion Criteria:

* Cannot give informed consent
* English language not sufficient to be able to meet the requirements of the study
* Does not meet other criteria for inclusion