Office-based Program To Improve Metabolic control In Sedentary Employees with type 2 diabetes: The ‘OPTIMISE Your Health' study

This is an 18-month, controlled-trial design, in which middle-aged and older office workers with T2D (n=250) will be randomly assigned to one of two conditions: 1) a multi-component intervention to reduce sitting time; 2) a usual-care control condition. Those randomised to the multi-component intervention will receive the following: • Health coaching: Trained-researchers in motivational training will deliver the health coaching sessions. The health coaching sessions will consist of two in-person meetings and eight telephone-delivered sessions over six months, to support initiation and maintenance of the sitting-time reduction changes. Both the face to face and telephone health coaching sessions will focus on delivering two key messages: Sit less and move more, both at work and outside of work. the following 6-months will consist of text message support via the propelo system. The in-person meetings will occur at baseline (at the participant’s workplace) and at the three month assessment (at Baker Institute) and will include the following: provision of feedback on baseline levels of sitting time, assessment and strategies to enhance motivation, and identify/set goals related to reducing and breaking-up sitting time in both the home and work environment. A participant workbook will also be provided to participants to help with goal setting and progress. The telephone calls will be brief (~10min) and used to check on progress on reducing sitting at home and at work, address problems, revise goals as needed and reinforce goal attainment. The telephone calls will be once a week for the first three weeks and then every three weeks until the end of the intervention. • Sit–stand desktop workstations: A manually adjustable sit–stand workstation will be provided for the duration of the study to use at the participant’s workplace. All participants will be required to provide written approval from their employer to use the workstation in the workplace. During the intervention, participants will be encourage to use the sit-stand workstation throughout their whole work day by regularly alternating between sitting and standing throughout the work day. After the intervention, participants will retain the sit-stand workstation. • Smartphone-based monitoring and behavioural prompting: A wrist-worn activity monitor (Fitbit) and Fitbit mobile app will be provided to each participant to continuously self-monitor their daily movement patterns in real-time over the 18 month intervention. On the smartphone app, participants can set prompts to interrupt their idle states and also receive reinforcing feedback in real-time on interruptions to prolonged periods of sedentary behaviour. Research staff will set up the Fitbit watch and the app during the initial face-to-face intervention session and encourage participants to use the device. The intervention group’s outcomes will be compared at three, six, twelve and eighteen months to those of the control condition.