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\section{Related Work}  Monitoring health-related behaviour has become more accessible and tangible for a wider age group of people since the birth of ubiquitous computing (UbiComp).The potentials of the emerging generation of UbiComp technologies are moving beyond step-counting and physiological monitoring to goal-sharing and information provision systems. This section of the paper reviews some prominent UbiComp technologies that have been used to promote physical activity. activity in particular walking.