“…Personalization primarily relied on patients' self-management to meet the minimal levels of recommended PA [26], and intervention materials were given as printed booklets, multimedia content or communicated by phone calls. The broad-range nature of these methods is still present in many mHealth interventions [12], [13], thus hampering the introduction of more sophisticated personalization strategies. This opens up opportunities to introduce mobile technologies and monitoring devices to gather objective, comparable and quantifiable information about each patient's health and performance during the intervention process [27], [28], which can potentially be used to tailor and adapt such process to the specific user needs.…”