**2. Related Work**

Large proportions of the population report insufficient physical activity, high volumes of sedentary behaviour and poor sleep [16–21]. The most common methods to capture sedentary behaviour are self-reporting diaries, direct observations, smartphone applications and wearable devices [22]. Self-reporting diaries and direct observation mechanisms are difficult with respect to recording daily routines of a long duration and are time consuming to manage on a daily basis. On the other hand, wearable devices and smartphone applications represent a comprehensive way to monitor sedentary behaviour continuously. We report the efforts of the research community in monitoring sedentary behaviour in the following section.
