| 제목 |
Diving Bradycardia of Elderly Korean Women Divers, Haenyeo, in Cold Seawater: A Field Report |
| 등록일 |
2015-12-14 |
첨부파일 |
|
| 구분 |
SCI |
| 학술지 |
INDUSTRIAL HEALTH |
| 발표일 |
2015-12-01 |
| 저자 |
이주영, 이효현, 김시연, 장영준, 백윤정, 강권용 |
|
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 13oC. 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. |
