ARSAS (Augmented reality supported Aging system), is a system developed for maintaining the work ability of older workers in industrial context. ARSAS integrates two main technologies the "video summarization" (automatic summary of video streams) and the spatial augmented reality. The system is able to project on the workbench surfaces pre-recorded instruction video and / or technical information from digital manuals. The operator performs his tasks normally, but is videotaped and, if necessary, assisted in his activities by AR instructions and multimedia. The main advantages of the system are: to provide a digital memory and reduce the cognitive load of the operator. A second benefit is that the system can easily acquire and store the knowledge of skilled and\or experienced workers in semi-automatic way. The preliminary tests showed a significant reduction in the risk of errors and execution times.