Abstract
The purpose of this study is to investigate the heart rate adaptations during deep dave diving with MCCR (mechanical closed circuit rebreather). Previous studies on this matter have not been conducted to the depths reached in this study and most of them have been conducted inside hyperbaric chambers trying to recreate the immersion conditions. The data collection took place during the exploration of two hydrogeological sites by a professional cave diver. The recordings were made using a SCUBAPRO GALILEO SOL® dive computer capable of monitoring the heart rate, with a sampling interval of 0,25 Hz. The data collected confirm a direct relationship between the increase in diving depth and the increase in the detected heart rate.
Highlights
The purpose of this study is to investigate the heart rate adaptations during deep dave diving with MCCR
The purpose of this study is to investigate the heart rate adaptation induced by deep diving with MCCR in flooded caves
The third dive reaches a depth of 150.32 meters and it is possible to observe a further increase in the descending average heart frequency that rises to 118 ± 8 bpm
Summary
The purpose of this study is to investigate the heart rate adaptation induced by deep diving with MCCR (mechanical closed circuit rebreather) in flooded caves. This field has not yet been thoroughly investigated, knowledge of human diving response in this setting is scarce. Most of the studies have been carried out at relatively shallow depths or in apnea [1]. Often in the studies conducted in the past years discordant results are found and the heart rate data is detected as a secondary parameter, through which it is possible to analyze other physiological adaptations. Much of the measurements in these studies were conducted in conditions that attempt to simulate a real dive, such as through the use of a hyperbaric chamber, or inside a swimming pool
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