This week’s episode of the Heart Rate Variability Podcast explores three new publications from September 5–11, 2025. We look at advances in contactless HRV monitoring using millimeter-wave radar, how physical fatigue alters time-domain and nonlinear HRV metrics, and a review of how accurate consumer wearables really are when tracking HRV. We dive into what these findings mean for clinicians, researchers, and anyone using HRV to track resilience, recovery, or performance. References Cui, Y., Zhang, W., Xu, J., Liu, Y., & Chen, H. (2025). Non-Contact Heart Rate Variability Monitoring with FMCW Radar via a Novel Signal Processing Algorithm. Sensors, 25(17), 5607. Read here Zhang, J., Niu, X., Wei, X., Ma, J., & Du, W. (2025). Effects of Induced Physical Fatigue on Heart Rate Variability in Healthy Young Adults. Sensors, 25(17), 5572. Read here Pramanik, P. (2025, September 8). Wearable health trackers reveal how accurate your smartwatch really is. News-Medical. Read here