Łukasz Chojnowski, Mariusz Suchcicki, Karol Krupiniewicz, Miłosz Rogiński, Marek Wojciechowicz, Stanisław Rogiński, Katarzyna Mazurek, Anna Dominiczak, Marta Brzęcka, and Krzysztof Rogiński. “THE "FITNESS AGE" CONSTRUCT IN CONSUMER WEARABLES: A CRITICAL REVIEW OF PHYSIOLOGICAL VALIDITY AND THE PSYCHOSOCIAL IMPACT ON CARDIOVASCULAR PATIENT IDENTITY”. International Journal of Innovative Technologies in Social Science, no. 1(49), Feb. 2026, doi:10.31435/ijitss.1(49).2026.4954.