Physical Activity Intervention for Loneliness (PAIL)

Inclusion Criteria:

1. community-dwelling older adults aged 60 years and older as defined according to the United Nations standard numerical criterion (World Health Organization, 2016);
2. previously sedentary (i.e. engaged in less than 20 minutes per week of regular physical activity for the past month and < 125 minutes/week of moderate intensity physical activity) (Stevens et al., 1998). Moderate intensity activity that is noticeable accelerates the heart rate and is equal to approximately 3-6 metabolic equivalents (METs) (American College of Sports Medicine, 2013);
3. at risk of feeling socially isolated or lonely (indicated by a score of 6 or higher out of 9) on the 3-item loneliness scale for the phone screening by Hughes et al. (2004) (Appendix 1 - Phone-based eligibility screening form);
4. physically mobile as measured using the Short Physical Performance Battery (SPPB) (Guralnik et al., 1994) with a score ≥ 9 out of 12 (Pahor et al., 2014);
5. healthy or having one or more common chronic diseases but ambulatory;
6. without a cognitive disability as assessed by the Montreal Cognitive Assessment (MOCA) (Nasreddine et al., 2005) with a score ≥ 22 out of 30 (Freitas et al., 2013);
7. able to give written informed consent;
8. English speaking and able to complete paper and pencil questionnaires.

Exclusion Criteria:

1. not community-dwelling older adults 60 years or over;
2. not previously sedentary;
3. currently taking part in another physical activity intervention;
4. not at risk for feeling socially isolated or lonely (i.e. score of less than 6 (out of 9) on the 3-item loneliness scale for the phone screening by Hughes et al., (2004);
5. moderate to severe cognitive disability or clinical diagnosis of dementia;
6. physical disability (i.e. SPPB score less than 9);
7. severe frailty or any chronic health condition that precludes participation in the physical activity intervention and significantly limits the physical mobility of the participant (i.e. hospital settings/ non-ambulatory regime);
8. cognitive disability (i.e. less than 14 points on MOCA);
9. not able to give written informed consent;
10. not English speaking that precludes taking pen and paper tests.