In 2010 the Danish Centre for Strategic Research in Type 2 Diabetes (DD2) and TrygFondens Centre for Aktiv Sundhed (CFAS), Rigshospitalet, Denmark, developed the InterWalk Application (IW app) to the smartphone to promote IWT on a larger scale. IWT has the potential to increase physical activity in a large group of T2D patients and hopefully improve lifestyle in patients with T2D. However, motivation for lifestyle changes is subjectively driven and individually determined (25-27). The personal resources and the close environment are key determinants of how challenges are handled in everyday life (28,29). Motivational factors are important for changing physical activity behaviour in patients with T2D, but knowledge on how motivation is maintained for a sustainable active lifestyle is limited. Studies of the effectiveness of employing smartphones as a vehicle to improve physical activity behaviour in everyday life in the long-term in patients with T2D is therefore needed.