Should cardiac rehabilitation programmes be specifically targeting sedentary time?
Abstract Funding Acknowledgements Type of funding sources: None. Background / Introduction Structured exercise classes and advice regarding regular moderate intensity physical activity are well-established components of cardiac rehabilitation (CR). Sedentary behaviour, refers to activities typically sitting or lying that do not substantially increase energy expenditure above resting, and increasing evidence suggests adults should limit their sedentary time to less than 9 hours/day as such behaviour with increased cardiovascular and all-cause mortality with additional benefits likely gained sitting less than 6-8 hours/day. Nonetheless sedentary behaviours are often overlooked or are only partially assessed via self-report in CR programmes. Due to covid restrictions (lockdown, social distancing, suspension of face-to-face CR programmes) there is concern that sedentary time may further increase in this population. Thus, it may be important to effectively monitor and target sedentary time, alongside traditional advice, to minimise its negative health impacts. Purpose Can a CR programme, adapted to remote delivery due to covid, objectively measure sedentary behaviour in a way that is feasible in every day practice and acceptable to patients? Methods Consecutive cardiovascular patients attending an initial assessment (via telephone or video) on the Our Hearts Our Minds Programme for Cardiovascular Health between December 2020 and February 2021 were asked to wear activPAL (PAL technologies Ltd., Glasgow, UK), a triaxial accelerometer, on their thigh for 7 days to measure the postural aspect of sedentary behaviour. On return of the monitor, the data was analysed using proprietary algorithms (intelligent activity classification) generating a report summarising time spent sitting, prolonged sitting, step count average, number of sit to stand transitions, moderate intensity activity minutes, most sedentary time(s) of the day and percentages spent in these activities. This personalised report was shared with the patient and their goals in terms of sedentary behaviour and physical activity were discussed and agreed. Results 59 referrals were received between mid December 2020 and February 2021, of which 52 had an initial virtual assessment. Of these, 50 patients accepted an activPAL (96% response rate). Mean age 62.6 years. The output from the activPal is shown in table 1. The average sitting time overall was 9 hours 36 minutes. The breakdown in proportions sitting for extended periods of time are detailed in table below Conclusion 2/3 of cardiovascular patients attending CR had levels of sitting time greater than what is recommended following their IA. Measuring sedentary time beyond self-report in CR programmes using activPal was feasible in a CR programme with 96% of consecutive patients wearing and returning activPAL. Repeat analysis at end of programme will show if use of this data results in reduction of same .