Summary of the Usability Protocol (HPs)
HPs did not share many opinions or suggestions for further development of the Senso but focused more on the other components of the COCARE system. Regarding the assessment system, they found the UI and navigation easy and user-friendly, praising the warm-up feature as well as the possibility of repeating the warm-up as often as needed. However, they were more critical of the Stroop Test, questioning its feasibility and comprehensibility. In addition, some HPs felt that the Coordinated Stability Test could be too demanding for OAs.Regarding the assessment report, HPs appreciated the general structure and training recommendations; they only wished for simpler explanations of specific terms such as HPs’ criticisms of the Senso Flex aligned with the OAs’ requirements. For instance, the low step detection sensitivity of the mat and lack of demarcation of the center area were common concerns shared by HPs and OAs. In this regard, it was suggested to create an embossed border or tactile texture separating the center area from the outer fields. Finally, a few HPs expressed concerns about the risk of falling, which is why they proposed providing lateral support through chairs or walkers.The exergames were viewed very positively by HPs, who found them to be a good challenge, good exercise, and enjoyable. In addition, most HPs described the instructions as understandable and intuitive. Only some suggested the inclusion of pictures or animations to illustrate the instructions. When evaluating the games separately, Finally, when commenting on the rehabilitation cockpit, HPs particularly praised its overall usefulness and the clear overview of training progress. Furthermore, they found the general UI and especially the setting possibilities to be simple and intuitive. Nevertheless, a few HPs rated other therapists’ and older patients’ acceptance of remote therapy and constant monitoring as low. Moreover, HPs suggested some improvements regarding future communication possibilities, namely, the integration of a video call feature, a chat section, or a real-time audio-video connection.In 