Key result
SCUBA diving at all depths consistently decreased heart rate and increased parasympathetic activity compared to baseline, while deep dives (150 and 200 ft) additionally increased sympathetic dynamics.
Why the study?
Do SCUBA dives of varying depths and gas mixtures alter cardiac autonomic nervous system activity in SCUBA divers?
Population
SCUBA divers
Comparison
SCUBA dives at various depths breathing… vs Baseline depth at sea level
Design
Other
Follow-up
During the dive
Authors
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Alerts clinicians to monitor autonomic responses in divers with cardiac risk; leaves open arrhythmia prediction and depth thresholds.
Observational (n=24)
Do SCUBA dives of varying depths and gas mixtures alter cardiac autonomic nervous system activity in SCUBA divers?
Absolute Event Rate: 84.17% vs 99.51%
p-value: p=<0.05
SCUBA diving induces depth- and duration-dependent increases in parasympathetic tone, with deep dives (150-200 ft) additionally increasing sympathetic dynamics.
Noh et al. (2018) conducted an observational in Healthy experienced divers (n=24). SCUBA diving at various depths and gas mixtures vs. Baseline (floating on surface) was evaluated on Heart rate (bpm) at 33 ft depth after 30 minutes (p=<0.05). SCUBA diving at all depths consistently decreased heart rate and increased parasympathetic activity compared to baseline, while deep dives (150 and 200 ft) additionally increased sympathetic dynamics.
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