This study is a single-blinded (outcome assessor) and parallel-group non-inferiority RCT. Chinese older adults aged ≥60 years with chronic primary insomnia will be randomized evenly (1:1) to either the brisk walking training group or the CBT-I group. Participants in the brisk walking training group receive an eight-week instructor-led interval brisk walking training (40 minutes/session, three sessions/week). Participants in the CBT-I group receive standard-of-care group-based eight-session CBT-I (one session/week). Self-reported and objective sleep outcomes are measured at baseline (T0), after completion of the intervention (T1), and six (T2), and 12 months after T1 (T3).
Aged ≥60 years;
Ethnic Chinese; able to read, write and speak Cantonese
Having a Hong Kong ID;
Willing to wear an accelerometer on the wrist for a week to assess sleep parameters at T0, T1, and T2.
Score ≥1 in the Chinese version of the Physical Activity Readiness Questionnaire (PAR-Q);
Currently regularly practicing a moderate-intensity PA program such as brisk walking or Tai Chi (≥3 times a week, ≥30 minutes/session);
Currently receiving or scheduled to receive CBT-I during the study period;
Score ≤16 in the validated telephone version of the Cantonese Mini-Mental State Examination (T-CMMSE).