Reframing Retirement: An Examination of Identity Change and Self-Regulation Approaches to Promote Physical Activity

The primary objective of this clinical trial is to test the efficacy of an innovative multimodal eHealth \& mHealth intervention (focused on emphasizing identity/habit and/or self-regulation) on increasing moderate to vigorous (MVPA) across 12 months among newly retired adults not meeting Physical Activity guidelines at study baseline, thus at higher risk of age-related chronic diseases. The secondary objectives are to examine whether these approaches improve physical and mental well-being and health related fitness-outcomes. Principal Research Question 1: Does an intervention focused on identity/habit + self-regulation skills + education (ID) increase moderate-to-vigorous intensity physical activity (MVPA) compared with an intervention focused on self-regulation skills + education (SR), and an education control condition (ED)? Three-arm parallel design single blinded randomized controlled trial. Participants will be randomized to one of three groups (ID, SR, ED) for 12 months duration. * After the initial screening process, eligible participants will be provided with an accelerometer-mailed or delivered in person-to wear for seven consecutive days. Data collected will verify baseline physical activity levels and determine final eligibility based on adherence to physical activity guideline thresholds. * Participants will visit the lab for fitness testing and complete an online questionnaire See below in "detailed description" the breakdown/delivery given for each of the 3 arms.

BACKGROUND: According to the 2021 census, there are 9.7 million people aged 60 or over in Canada, a surge of 8% since the 2016 census. Further, with life expectancy increasing, the prevalence of chronic diseases and conditions such as hypertension, type 2 diabetes, cancer, cognitive decline, frailty, and dementia that are associated with an ageing population are placing increasing pressures on healthcare systems. There is compelling evidence that engaging in regular PA, of at least 150 minutes of moderate to vigorous intensity aerobic PA throughout the week complemented with muscle strengthening activities at least twice a week, can prevent the onset and progress of age-related chronic diseases and positively influence physical and mental health outcomes. Despite these well-documented benefits, 80% of Canadian adults are not meeting the recommended PA guidelines, with levels of PA decreasing steadily with age. Thus, implementing interventions that effectively increase PA to optimize the physical and mental health outcomes is a public health priority. To date, interventions promoting PA have shown mixed results, so there is a need to better understand, and test innovative behavior change techniques. Further, PA interventions have not focused on specific aging subgroups (e.g., 60-70 years, \>80 years), making it difficult to design and implement effective interventions and make suitable recommendations for policy and practice. One of those important groups that has not received enough evidence-based research (only two small studies), are those transitioning into retirement (i.e., 60-70 years). Transitioning into retirement is established as a seminal period where significant altercations in lifestyle (e.g., reframing of identity, lack of routine) present an opportunity to promote PA. TARGET POPULATION: Participants will be: 1. aged between 60 -70 years, living in Victoria, British-Columbia, Canada. 2. recently retired (within 1.5 years) from occupational work 3. have an internet connection with a computer or smartphone 4. able to engage in MVPA independently, 5. participate in MVPA below Canadian recommended aerobic guidelines (\<150 minutes of MVPA per week, screened by Godin's Leisure Time Exercise Questionnaire. The researcher will also screen participants on baseline accelerometry results (as a secondary assurance). Those participants above the Canadian recommended guidelines will be excluded from the trial. SAMPLE SIZE : 159 participants, 53 participants per group Participants will then be randomized into one of the three conditions (post accelerometer screening): * 1\) The ID condition will be comprised of a 6-week, 10 module format, covering all reflective, regulatory, and reflexive processes. * 2 The SR condition will have access to modules 1 through 6 (reflective and regulatory processes) * 3 The ED condition will have access to modules 1 to 3 (reflective processes). * Additional modules (4 in SR, 7 in ED) will be included in the SR and ED conditions to ensure equivalence of dose across conditions. * These additional modules will focus on general retirement considerations such as travel, socializing, and financial planning with the same style and formatting as the PA modules. * All groups will receive support/booster check-ins on the same material as their intervention designation at 3-,6-, and 12 weeks and 6-months. * After the initial 6-week intervention period, participants will be given follow-up online questionnaires and accelerometers. * This will follow a similar protocol for the 3-, 6- and 12-month time period (6-month assessment will include fitness testing). * In addition, all participants will be asked to participate in an end-of-trial semi-structured interview (at 6-months).