Key result
Cold seawater breath-hold diving is linked to a ~20% lower heart rate versus surface swimming.
Observational (n=9)
No
Effect estimate: 20% decrease
Absolute Event Rate: 101% vs 125%
p-value: p=<0.001
Elderly Korean women divers exhibit significant diving bradycardia, with older divers voluntarily adjusting their workload by reducing diving time and frequency.
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Small observational data on elderly haenyeos warrant clinical caution; leaves open age-related differences in diving bradycardia.
Lee et al. (2015) conducted an observational in Healthy elderly women divers (haenyeo) (n=9). Breath-hold diving in cold seawater vs. Surface swimming was evaluated on Heart rate during bottom time compared to surface swimming time (20% decrease, p=<0.001). Elderly Korean women divers exhibited diving bradycardia with a 20% decrease in heart rate during bottom time (101 bpm) compared to surface swimming (125 bpm) in cold seawater.
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