The objective of this randomised controlled trial is to examine the effectiveness of a theory-driven behavioural change intervention on total sedentary time (primary outcomes), moderate-to-vigorous physical activity time, intention of behavioural change, future time perception, behavioural prepotency, self-regulation capacity, and exercise capacity in individuals with coronary heart disease.
Hypotheses:
Compared to the participants in the control group, participants in the intervention group will demonstrate:
1. Significantly less total sedentary time 2. Significantly improved MVPA time, 3. Significantly better intention of behavioural change, 4. Significantly higher level of behavioural prepotency, 5. Significantly enhanced self-regulation capacity, and 6. Significantly greater future time perception 7. Significantly better exercise capacity at the immediate post-intervention (T1), the 1-month post-intervention (T2), and the 6-month post-intervention (T3).
Participants will:
Participants in the intervention group will participate in a theory-driven behavioural change intervention over three months, comprising four individual face-to-face sessions (45 minutes each) and four individual telephone sessions (20 minutes each), along with the usual care.
Participants in the attention control group will continue to have the usual care, which includes regular follow-up at the cardiac clinic. Education sessions, consisting of information about healthy lifestyles, except physical activity and sedentary behaviour, with the same schedule as the intervention group, will be provided to account for potential attention effects from contacts.
Adult 18 years old and above
Diagnosed with coronary heart disease within one year
Engaged in MVPA less than 150 minutes per week and a minimum of 8 hours total sedentary time per day, both assessed using the Global Physical Activity Questionnaire
Able to communicate in Cantonese
Cannot perform brisk walking exercise
Unable to perform PA independently
Cognitive impairments, as indicated by an abbreviated mental test score of less than 7
Currently enrolled in another clinical trial focusing on limiting SB with/without enhancing PA
Parallel
A theory-driven behavioural change intervention
BehavioralA theory-driven behavioural change intervention is validated by an expert panel including professionals from various fields, such as nurse consultants, a specialty nurse in cardiology, an experienced registered nurse from a cardiac rehabilitation center in a regional hospital, a physiotherapist, and academia, focusing on strengthening intention to change (connected beliefs and temporal valuations), behavioral prepotency, and enhancing the self-regulatory capacity, as guided by the Temporal Self-Regulation Theory, and supplemented with a intervention booklet. The intervention is developed and facilitated by a registered nurse (principal investigator).
Attentive control group
BehavioralParticipants in the attention control group will participate in education sessions consisting of information about healthy lifestyles, except physical activity and sedentary behaviour. Activities match the time and attention dedicated by the intervention group. Activities are designed to have no impact on sedentary behaviour and physical activity.
Total sedentary time
Total sedentary time (per day) will be measured using the ActiGraph accelerometer (ActiGraph,Pensacola, FL), wGT3X-BT (during participants' waking time over 7 consecutive days, including both weekdays and weekends).
Moderate-to-vigorous physical activity time
Moderate-to-vigorous physical activity time (per week) will be measured using the ActiGraph accelerometer (ActiGraph, Pensacola, FL), wGT3X-BT (during participants' waking time over seven consecutive days, including both weekdays and weekends).
Self-regulation capacity
Self-regulation capacity will be measured using the Chinese version of the Brief Self-Control Scale (BSCS).
Behavioural prepotency
Behavioural prepotency (on both MVPA and SB) will be measured using the Chinese version of the Self-Reported Behavioural Automaticity Index (SRBAI).
Future time perception
Future time perception will be measured using the Chinese version of the Consideration of Future Consequences Scale (CFCS-14).
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