Choose to Move: How Can Health Benefits of an Effective, Scaled-up, Health Promotion Model for Older Adults be Sustained?

One-third of Canadians will be older adults (\>65y) by 2050. Thus, healthy aging is a public health priority. Many older adult health promoting interventions have been implemented, yet few were scaled-up and sustained. Choose to Move (CTM) is an effective, adaptable, community-based health promotion program for older adults. CTM, co-created with government and community stakeholders, has been scaled-up across British Columbia (BC) using a phased approach (2015-2021). The investigators evaluated the impact of CTM on the health of seniors who participated and the results were extremely positive: CTM increased mobility, physical activity, social connectedness and improved mental health indicators like loneliness. When these outcomes were assessed again, one year after the end of CTM, these improvements had diminished. In this trial the investigators aim to determine if health benefits of CTM can be maintained by providing ongoing support to CTM participants. Booster interventions have been defined as "brief contacts beyond the main part of the intervention to reinforce previous intervention content" (Fjeldsoe et al., 2011, p. 601). Choose to Move - Next Steps (CTM-NS) is a two-year intervention where participants who recently completed CTM will receive different doses of a 'booster' program. Specifically, participants will be randomly allocated to virtual group meetings on a monthly (study arm 1; high dose) or quarterly (study arm 2; low dose) basis. Group meetings will be facilitated by an Activity Coach. Objectives: The investigators will conduct 1) impact, 2) implementation, and 3) economic evaluations of CTM-NS across 24 months. Hypotheses: For objective 1, the investigators hypothesize that improvements in older adult participant outcomes (primary outcome: mobility; secondary outcomes: physical activity, loneliness, social isolation, social connectedness, sitting time, screen time, social network, health status) obtained during CTM will be maintained over the 2 year CTM-NS study. Participants in the monthly group meetings (study arm 1) will maintain benefits to a greater degree than participants in the quarterly group meetings (study arm 2). Objectives 2 and 3 are descriptive and therefore have no hypotheses.