Diving Responses in Experienced Rebreather Divers: Short-Term Heart Rate Variability in Cold Water Diving.

ABSTRACT:

Introduction

Technical diving is very popular in Finland throughout the year despite diving conditions being challenging, especially due to arctic water and poor visibility. Cold water, immersion, submersion, hyperoxia, as well as psychological and physiological stress, all have an effect on the autonomic nervous system (ANS).

Materials and methods

To evaluate divers' ANS responses, short-term (5 min) heart rate variability (HRV) during dives in 2-4°C water was measured. HRV resting values were evaluated from separate measurements before and after the dives. Twenty-six experienced closed circuit rebreather (CCR) divers performed an identical 45-meter decompression dive with a non-physical task requiring concentration at the bottom depth.

Results

Activity of the ANS br

SUBMITTER: Lundell RV 

PROVIDER: S-EPMC8058382 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature