Journal of Functional Morphology and Kinesiology
Feasibility of Wearable Heart Rate Variability Monitoring During a Military Closed-Circuit Rebreather Dive: An Exploratory Case Report
Par Enrico Moccia, Vincenzo Lionetti, Gabriele Lombardi et 6 autres.
Contenu en anglais
Résumé
Background
Heart rate variability (HRV) monitoring during real-world closed-circuit rebreather (CCR) diving remains methodologically challenging. This exploratory case report describes phase-related HRV variations obtained from a wearable device during a military CCR dive.
Methods
A trained male military diver underwent continuous monitoring with a RootiRx® single-lead wearable device placed in a custom waterproof enclosure. Three consecutive 20 min segments were analyzed: pre-dive, CCR dive, and immediate post-dive. The post-dive segment was not acquired under standardized resting conditions, and the participant continued to wear the device throughout this period. RR interval data were analyzed using Kubios HRV Scientific 4.3.0 with medium-threshold artifact correction, smoothness-prior detrending (λ = 500), and 4 Hz interpolation. Time-domain, frequency-domain, and nonlinear HRV indices were evaluated descriptively.