SeatPlus: A Smart Health Chair Supporting Active Sitting Posture Correction

Nowadays, sedentary and poor sitting postures mainly cause lumbar spine-related diseases for office workers. According to the related medical theory of sitting posture correction, this paper presents a smart chair SeatPlus that actively corrects the poor sitting posture. To identify and address the issues in sitting posture correction, we iterated our prototype three times following Lean UX design method. We evaluated SeatPlus in terms of system performance and system usability. The accuracy of the sitting posture recognition is higher than 90%, and the effectiveness of correction exceeds 70%. The overall usability of SeatPlus is good especially in two usability dimensions, impact and perceived Ease of Use. Furthermore, we find that the effectiveness of correction positively influences some usability dimensions, while the frequency of correction negatively influences the perceived ease of use.