Wearables and Internet of Things (IoT) Technologies for Fitness Assessment: A Systematic Review Passos, João ; Lopes, Sérgio Ivan ; Clemente, Filipe Manuel ; Moreira, Pedro Miguel ; Rico-González, Markel ; Bezerra, Pedro ; Rodrigues, Luís Paulo Abstract Publication: Sensors Pub Date: August 2021 DOI: 10.3390/s21165418 Bibcode: 2021Senso..21.5418P