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Diving bradycardia of elderly Korean women divers, haenyeo, in cold seawater: a field report.

Lee JY, Lee HH, Kim S, Jang YJ, Baek YJ, Kang KY - Ind Health (2015)

Bottom Line: All haenyeos showed diving bradycardia with a decreased rate of 20 ± 8% at the bottom time (101 ± 20 bpm) when compared to surface swimming time (125 ± 16 bpm) in the sea.Older haenyeos among the nine elderly haenyeos had shorter diving time, less diving frequencies, and lower heart rate at work (p<0.05).These reductions imply that haenyeos voluntarily adjust their workload along with advancing age and diminished cardiovascular functions.

View Article: PubMed Central - PubMed

Affiliation: College of Human Ecology, Seoul National University, Republic of Korea.

ABSTRACT
The purpose of the present field study was to explore diving patterns and heart rate of elderly Korean women divers (haenyeo) while breath-hold diving in cold seawater. We hypothesized that the decreasing rate in heart rate of elderly haenyeos during breath-hold diving was greater and total diving time was shorter than those of young haenyeos from previous studies. Nine haenyeos participated in a field study [68 ± 10 yr in age, ranged from 56 to 83 yr] at a seawater temperature of 10 to 13 °C. Average total diving time including surface swimming time between dives was 253 ± 73 min (155-341 min). Total frequency of dives was 97 ± 28 times and they dived 23 ± 8 times per hour. All haenyeos showed diving bradycardia with a decreased rate of 20 ± 8% at the bottom time (101 ± 20 bpm) when compared to surface swimming time (125 ± 16 bpm) in the sea. Older haenyeos among the nine elderly haenyeos had shorter diving time, less diving frequencies, and lower heart rate at work (p<0.05). These reductions imply that haenyeos voluntarily adjust their workload along with advancing age and diminished cardiovascular functions.

No MeSH data available.


Related in: MedlinePlus

Relationships between age and diving time (A), frequency of dives (B), and heartrate at work (C).
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fig_003: Relationships between age and diving time (A), frequency of dives (B), and heartrate at work (C).

Mentions: a)(S-B) 100/S; b)Not counted


Diving bradycardia of elderly Korean women divers, haenyeo, in cold seawater: a field report.

Lee JY, Lee HH, Kim S, Jang YJ, Baek YJ, Kang KY - Ind Health (2015)

Relationships between age and diving time (A), frequency of dives (B), and heartrate at work (C).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4821902&req=5

fig_003: Relationships between age and diving time (A), frequency of dives (B), and heartrate at work (C).
Mentions: a)(S-B) 100/S; b)Not counted

Bottom Line: All haenyeos showed diving bradycardia with a decreased rate of 20 ± 8% at the bottom time (101 ± 20 bpm) when compared to surface swimming time (125 ± 16 bpm) in the sea.Older haenyeos among the nine elderly haenyeos had shorter diving time, less diving frequencies, and lower heart rate at work (p<0.05).These reductions imply that haenyeos voluntarily adjust their workload along with advancing age and diminished cardiovascular functions.

View Article: PubMed Central - PubMed

Affiliation: College of Human Ecology, Seoul National University, Republic of Korea.

ABSTRACT
The purpose of the present field study was to explore diving patterns and heart rate of elderly Korean women divers (haenyeo) while breath-hold diving in cold seawater. We hypothesized that the decreasing rate in heart rate of elderly haenyeos during breath-hold diving was greater and total diving time was shorter than those of young haenyeos from previous studies. Nine haenyeos participated in a field study [68 ± 10 yr in age, ranged from 56 to 83 yr] at a seawater temperature of 10 to 13 °C. Average total diving time including surface swimming time between dives was 253 ± 73 min (155-341 min). Total frequency of dives was 97 ± 28 times and they dived 23 ± 8 times per hour. All haenyeos showed diving bradycardia with a decreased rate of 20 ± 8% at the bottom time (101 ± 20 bpm) when compared to surface swimming time (125 ± 16 bpm) in the sea. Older haenyeos among the nine elderly haenyeos had shorter diving time, less diving frequencies, and lower heart rate at work (p<0.05). These reductions imply that haenyeos voluntarily adjust their workload along with advancing age and diminished cardiovascular functions.

No MeSH data available.


Related in: MedlinePlus