A Combined Health Action Process Approach and mHealth Intervention to Assess Sedentary Behaviour in Adults With Type 2 Diabetes - A Randomized Controlled Trial

Adults with type 2 diabetes (T2D) are less active and accumulate more sedentary behaviour (SB) than those without. Among adults with T2D, increased SB is associated with increased mortality after adjusting for physical activity. Canadian 24-hour SB movement guidelines recommend limiting SB to ≤8 hours, no more than 3 hours of recreational screen time, and breaking up long periods of SB as often as possible. Therefore, the purpose of this research study is for adults with T2D to achieve these SB Canadian 24-hour SB movement guidelines. To address this purpose, we will be conducting a six-week two-arm repeated measures randomized control trial. The intervention group will receive a theory-based behaviour change counselling session through zoom at week 0, mobile phone application at weeks 2 and 4 that encourage participants to create their own personal and specific action plans and coping strategies, and daily text messages that motivate participants to reduce and break up their SB. The control group will receive no intervention. The primary objective of the study is to reduce SB, while the secondary objectives are to break up SB, reduce screen time, improve quality of life, determine the perceptions towards the intervention, and validate the SB questionnaires. SB will be collected in the form of total daily SB, frequency of SB breaks, and duration of SB breaks. These variables will be measured through a SB and quality of life questionnaires that will be delivered through a downloadable mobile phone application. Outcome measures will be compared within and between groups to detect differences.