Within the KIEM project "Wavy Zone - stress reduction for better recovery for cardiac patients", research is being conducted on the effectiveness of stress management and reduction using the Blue Zone interventions in combination with biofeedback in cardiac patients during hospitalization and rehabilitation in their own living environment. The goal is to increase the quality of care in cardiac patients, reducing stress, anxiety and symptoms. The project contributes to the KIA of Health and Care, including mission II & III. The consortium is new and consists of Radboudumc, two innovative SMEs and two foundations.