RT Journal Article SR Electronic T1 Personalised eHealth intervention to increase physical activity and reduce sedentary behaviour in rehabilitation after cardiac operations: study protocol for the PACO randomised controlled trial (NCT03470246) JF BMJ Open Sport & Exercise Medicine JO BMJ OPEN SP EX MED FD BMJ Publishing Group Ltd SP e000539 DO 10.1136/bmjsem-2019-000539 VO 5 IS 1 A1 Ville Vasankari A1 Jari Halonen A1 Pauliina Husu A1 Henri Vähä-Ypyä A1 Kari Tokola A1 Jaana Suni A1 Harri Sievänen A1 Vesa Anttila A1 Juhani Airaksinen A1 Tommi Vasankari A1 Juha Hartikainen YR 2019 UL http://bmjopensem.bmj.com/content/5/1/e000539.abstract AB Introduction Personalized intervention to increase physical Activity and reduce sedentary behaviour in rehabilitation after Cardiac Operations (PACO) is a smartphone-based and accelerometer-based eHealth intervention to increase physical activity (PA) and reduce sedentary behaviour (SB) among patients recovering from cardiac surgery.Design Prospective randomised controlled trial.Methods and analysis The present protocol describes a randomised controlled clinical trial to be conducted in the Heart Centres of Kuopio and Turku university hospitals. The trial comprises 540 patients scheduled for elective coronary artery bypass grafting, aortic valve replacement or mitral valve repair. The patients will be randomised into two groups. The control group will receive standard postsurgical rehabilitation guidance. The eHealth intervention group will be given the same guidance together with personalised PA guidance during 90 days after discharge. These patients will receive personalised daily goals to increase PA and reduce SB via the ExSedapplication. Triaxial accelerometers will be exploited to record patients’ daily accumulated PA and SB, and transmit them to the application. Using the accelerometer data, the application will provide online guidance to the patients and feedback of accomplishing their activity goals. The data will also be transmitted to the cloud, where a physiotherapist can monitor individual activity profiles and customise the subsequent PA and SB goals online. The postoperative improvement in patients’ step count, PA, exercise capacity, quality of sleep, laboratory markers, transthoracic echocardiography (TTE) parameters and quality of life, and reduction in SB and incidence of major cardiac events are investigated as outcomes.Conclusions The PACO intervention aims to build a personalised eHealth tool for the online tutoring of cardiac surgery patients.Trial registration number NCT03470246.