There is provided a method of detection and monitoring of at least one position based activity by a subject, comprising: providing a wearable monitoring device including at least one position tag for tracking location of the subject in a space collecting body movement and location data of the subject within the space based on the tracked location of the position tag providing at least one activity sensor configured to sense at least one body movement of the subject within the space collecting body movement data based on the activity sensor correlating the body movement data with the location data contextually analyzing the correlation to identify at least one abnormal event or at least one normal event based on subject body movement and location where the body movement is performed and generating an alert indicative of the abnormal event or the normal event.
