Annals of Occupational and Environmental Medicine

Research Article

Effect of long term high altitude exposure on cardiovascular autonomic adjustment during rest and post-exercise recovery: Prem Bhattarai, Bishnu H. Paudel, Dilip Thakur, Balkrishna Bhattarai, Bijay Subedi, Rita Khadka; Ann Occup Environ Med 2018;30:34. Published online May 11, 2018; DOI: https://doi.org/10.1186/s40557-018-0240-1

Abstract PDF Supplementary Material PubReader ePub

Background

Despite the successful adaptation to high altitude, some differences do occur due to long term exposure to the hypoxic environment. The effect of long term high altitude exposure on cardiac autonomic adjustment during basal and post-exercise recovery is less known. Thus we aimed to study the differences in basal cardiac autonomic adjustment and its response to exercise in highlanders and to compare it with lowlanders.

Methods

The study was conducted on 29 healthy highlander males who were born and brought up at altitude of 3000 m and above from the sea level, their cardiac autonomic adjustment was compared with age, sex, physical activity and ethnicity-matched 29 healthy lowlanders using Heart Rate Variability (HRV) during rest and recovery from sub-maximal exercise (3 m step test). Intergroup comparison between the highlanders and lowlanders and intragroup comparison between the rest and the postexercise recovery conditions were done.

Results

Resting heart rate and HRV during rest was comparable between the groups. However, heart rate recovery after 3 min step test was faster in highlanders (p < 0.05) along with significantly higher LF power and total power during the recovery phase. Intragroup comparison of highlanders showed higher SDNN (p < 0.05) and lower LF/HF ratio (p < 0.05) during recovery phase compared to rest which was not significantly different in two phases in lowlanders. Further highlander showed complete recovery of RMSSD, NN50, pNN50 and HF power back to resting level within five minutes, whereas, these parameters failed to return back to resting level in lowlanders within the same time frame.

Conclusion

Highlanders completely recovered back to their resting state within five minutes from cessation of step test with parasympathetic reactivation; however, recovery in lowlanders was delayed.

Electronic supplementary material

The online version of this article (10.1186/s40557-018-0240-1) contains supplementary material, which is available to authorized users.

Citations

Citations to this article as recorded by

Effects of Altitude training on Ethiopian endurance athletes recovery heart rate and hematological variables
Tesfaye Moges, Mathivanan Dhamodharan, Mulay Gebretensay, Alemmebrat Kiflu, Efrem Kentiba
Pedagogy of Physical Culture and Sports.2024; 28(3): 213. CrossRef
High-altitude exposure duration dependent global and regional gray matter volume decrease in healthy immigrants: a cross-sectional study
Jie Feng, Weiwei Men, Xiao Yu, Wenjia Liu, Shiyu Zhang, Jie Liu, Lin Ma
Acta Radiologica.2023; 64(2): 751. CrossRef
Cardiorespiratory function, resting metabolic rate and heart rate variability in coal miners exposed to hypobaric hypoxia in highland workplace
Sanjun Yang, Chunhu Tian, Fan Yang, Qi Chen, Ruiyuan Geng, Chunyan Liu, Xinrong Wu, Wing-Kai Lam
PeerJ.2022; 10: e13899. CrossRef
High-altitude Hypoxia Influences the Activities of the Drug-Metabolizing Enzyme CYP3A1 and the Pharmacokinetics of Four Cardiovascular System Drugs
Junbo Zhu, Yabin Duan, Delong Duo, Jianxin Yang, Xue Bai, Guiqin Liu, Qian Wang, Xuejun Wang, Ning Qu, Yang Zhou, Xiangyang Li
Pharmaceuticals.2022; 15(10): 1303. CrossRef
The Use of a Smartphone Application in Monitoring HRV during an Altitude Training Camp in Professional Female Cyclists: A Preliminary Study
Alejandro Javaloyes, Manuel Mateo-March, Agustín Manresa-Rocamora, Santiago Sanz-Quinto, Manuel Moya-Ramón
Sensors.2021; 21(16): 5497. CrossRef
Shortening Work-Rest Durations Reduces Physiological and Perceptual Load During Uphill Walking in Simulated Cold High-Altitude Conditions
Alessandro Fornasiero, Aldo Savoldelli, Federico Stella, Alexa Callovini, Lorenzo Bortolan, Andrea Zignoli, David A. Low, Laurent Mourot, Federico Schena, Barbara Pellegrini
High Altitude Medicine & Biology.2020; 21(3): 249. CrossRef
Values of heart rate at rest in children and adults living at different altitudes in the Andes
Christian R. Mejia, Matlin M. Cárdenas, Dayanne Benites-Gamboa, Armando Miñan-Tapia, Gloria S. Torres-Riveros, Michael Paz, Yomayra Perez, José Rojas-Camayo, Xianwu Cheng
PLOS ONE.2019; 14(2): e0213014. CrossRef

200 View
0 Download
9 Web of Science
7 Crossref

Research Article

The responses of subjective feeling, task performance ability, cortisol and HRV for the various types of floor impact sound: a pilot study: Seok Hyeon Yun, Sang Jin Park, Chang Sun Sim, Joo Hyun Sung, Ahra Kim, Jang Myeong Lee, Sang Hyun Lee, Jiho Lee; Ann Occup Environ Med 2017;29:13. Published online May 15, 2017; DOI: https://doi.org/10.1186/s40557-017-0168-x

Abstract PDF PubReader ePub

Background

Recently, noise coming from the neighborhood via floor wall has become a great social problem. The noise between the floors can be a cause of physical and psychological problems, and the different types of floor impact sound (FIS) may have the different effects on the human’s body and mind. The purpose of this study is to assess the responses of subjective feeling, task performance ability, cortisol and HRV for the various types of floor impact.

Methods

Ten men and 5 women were enrolled in our study, and the English listening test was performed under the twelve different types of FIS, which were made by the combinations of bang machine (B), tapping machine (T), impact ball (I) and sound-proof mattress (M). The 15 subjects were exposed to each FIS for about 3 min, and the subjective annoyance, performance ability (English listening test), cortisol level of urine/saliva and heart rate variability (HRV) were examined. The sound pressure level (SPL) and frequency of FIS were analyzed. Repeated-measures ANOVA, paired t-test, Wilcoxon signed rank test were performed for data analysis.

Results

The SPL of tapping machine (T) was reduced with the soundproof mattress (M) by 3.9–7.3 dBA. Impact ball (I) was higher than other FIS in low frequency (31.5–125 Hz) by 10 dBA, and tapping machine (T) was higher than other FIS in high frequency (2–4 k Hz) by 10 dBA. The subjective annoyance is highest in the combination of bang machine and tapping machine (BT), and next in the tapping machine (T). The English listening score was also lowest in the BT, and next in T. The difference of salivary cortisol levels between various types of FIS was significant (p = 0.003). The change of HRV parameters by the change of FIS types was significant in some parameters, which were total power (TP) (p = 0.004), low frequency (LF) (p = 0.002) and high frequency (HF) (p = 0.011).

Conclusions

These results suggest that the human’s subjective and objective responses were different according to FIS types and those combinations.

Citations

Citations to this article as recorded by

Quantifying the Effect of Noise on Cognitive Processes: A Review of Psychophysiological Correlates of Workload
Jan Grenzebach, Erik Romanus
Noise and Health.2022; 24(115): 199. CrossRef

196 View
0 Download
1 Web of Science
1 Crossref

Research Article

Factors related to heart rate variability among firefighters: Jae-Hong Shin, Jung-Youb Lee, Seon-Hee Yang, Mi-Young Lee, In-Sung Chung; Ann Occup Environ Med 2016;28:25. Published online June 13, 2016; DOI: https://doi.org/10.1186/s40557-016-0111-6

Abstract PDF PubReader ePub

Objectives

The aim of this study was to investigate factors associated with heart rate variability in firefighters working in a metropolitan city in South Korea.

Methods

Self-administered questionnaires including Korean Occupational Stress Scale (KOSS) as well as surveys collecting socio-demographic characteristics and work-related factors were given to 962 firefighters. After exclusion for missing data, 645 firefighters were included, and analysis of covaiance adjusted for the general risk factors and job characteristics were used to assess the relationship between heart rate variability and associated factors.

Results

SDNN and RMSSD and were decreased in the area of occupational climate of the group with high job stress (p = 0.027, p = 0.036). HF(ln) was decreased in the area of organizational system and occupational climate of the group with high stress that statistically significant level (p = 0.034, p = 0.043).

Conclusions

Occupational climate and organizational system are associated with reduction of heart rate variability. Preventive medical care plans for cardiovascular disease of firefighters through the analysis and evaluation of job stress factors are needed.

Citations

Citations to this article as recorded by

The Influence of Emergency Call Volume on Occupational Workload and Sleep Quality in Urban Firefighters
Jacob D. Jelmini, Phillip A. Gribble, Mark G. Abel, Lauren N. Whitehurst, Nicholas R. Heebner
Journal of Occupational & Environmental Medicine.2024; 66(7): 580. CrossRef
On-Duty Resting Heart Rate Variability at the Fire Station Is Related to Cardiorespiratory Fitness and Physical Activity Levels in Firefighters
Philémon Marcel-Millet, Philippe Gendron
Journal of Occupational & Environmental Medicine.2024; 66(3): e111. CrossRef
Evaluation of the relationship between occupational-specific task performance and measures of physical fitness, cardiovascular and musculoskeletal health in firefighters
Jaron Ras, Elpidoforos S. Soteriades, Denise L. Smith, Andre P. Kengne, Lloyd Leach
BMC Public Health.2024;[Epub] CrossRef
The effect of extended shift work on autonomic function in occupational settings: A systematic review and meta-analysis
Jacob D Jelmini, Jeremy Ross, Lauren N Whitehurst, Nicholas R Heebner
Journal of Occupational Health.2023;[Epub] CrossRef
Heart Rate Variability Assessment of Land Navigation and Load Carriage Activities in Specialist Police Selection
Colin D. Tomes, Elisa F. D. Canetti, Ben Schram, Robin Orr
Healthcare.2023; 11(19): 2677. CrossRef
Effects of cardiovascular health, musculoskeletal health and physical fitness on occupational performance of firefighters: protocol for a systematic review and meta-analysis
Jaron Ras, Andre Pascal Kengne, Denise Smith, Elpidoforos Soterakis Soteriades, Lloyd Leach
BMJ Open.2022; 12(7): e061435. CrossRef
Effects of Cardiovascular Disease Risk Factors, Musculoskeletal Health, and Physical Fitness on Occupational Performance in Firefighters—A Systematic Review and Meta-Analysis
Jaron Ras, Andre P. Kengne, Denise L. Smith, Elpidoforos S. Soteriades, Rucia V. November, Lloyd Leach
International Journal of Environmental Research and Public Health.2022; 19(19): 11946. CrossRef
Cardiovascular Disease Risk Factors, Musculoskeletal Health, Physical Fitness, and Occupational Performance in Firefighters: A Narrative Review
Jaron Ras, Denise L. Smith, Andre P. Kengne, Elpidoforos E. Soteriades, Lloyd Leach, Ike S. Okosun
Journal of Environmental and Public Health.2022;[Epub] CrossRef
Acute Physiological Response of Live-Fire Simulation Activities Affecting Cardiovascular Health in Live-Fire Instructors
Gwan-Jin Park, So Yeon Kong, Dong-Min Shin, Dae In Lee, Beom-Seok Ku, Je-Hwan Oh, Sang-Chul Kim
Journal of Occupational & Environmental Medicine.2022; 64(1): 46. CrossRef
Psychophysiological responses of firefighters to day and night rescue interventions
Philémon Marcel-Millet, Alain Groslambert, Philippe Gimenez, Sidney Grosprêtre, Gilles Ravier
Applied Ergonomics.2021; 95: 103457. CrossRef
Health outcomes of psychosocial stress within firefighters: A systematic review of the research landscape
Somkene Igboanugo, Philip L Bigelow, John G Mielke
Journal of Occupational Health.2021;[Epub] CrossRef
Field Monitoring the Effects of Overnight Shift Work on Specialist Tactical Police Training with Heart Rate Variability Analysis
Colin Tomes, Ben Schram, Robin Orr
Sustainability.2021; 13(14): 7895. CrossRef
Combined effect of surface anomalies and volumetric defects on fatigue assessment of AlSi7Mg fabricated via laser powder bed fusion
Milad Hamidi Nasab, Simone Romano, Dario Gastaldi, Stefano Beretta, Maurizio Vedani
Additive Manufacturing.2020; 34: 100918. CrossRef
Obesity prevalence in Brazilian firefighters and the association of central obesity with personal, occupational and cardiovascular risk factors: a cross-sectional study
Fernanda Camargo Damacena, Thatiany Jardim Batista, Lorena Rocha Ayres, Eliana Zandonade, Karla Nívea Sampaio
BMJ Open.2020; 10(3): e032933. CrossRef
Effects on Firefighters’ Nocturnal Cardiac Autonomic Activity and Sleep Quality of On-Call Nights With and Without Simulated Firefighting Interventions
Philémon Marcel-Millet, Alain Groslambert, Gilles Ravier
Journal of Occupational & Environmental Medicine.2020; 62(11): e644. CrossRef
Relationships Between Heart Rate Variability, Occupational Performance, and Fitness for Tactical Personnel: A Systematic Review
Colin Tomes, Ben Schram, Robin Orr
Frontiers in Public Health.2020;[Epub] CrossRef

175 View
0 Download
19 Web of Science
16 Crossref

Original Article

Chronic and Acute Effects of Work-related Factors on Heart Rate Variability: Minjeong Son, Youngki Kim, Sangbum Ye, Jihyun Kim, Dongmug Kang, Jangseong Ham, Yonghwan Lee; Korean Journal of Occupational and Environmental Medicine 2008;20(4):314-325. Published online December 31, 2008; DOI: https://doi.org/10.35371/kjoem.2008.20.4.314

Abstract PDF

OBJECTIVES
Reduced heart rate variability (HRV) is one of the serious risk factors for heart diseases. We evaluated the acute and chronic effects of work-related factors on HRV.
METHODS
The five-minute HRV of 85 male workers from an automobile assembly factory were measured at 9 A.M. (before-work) and at 5 P.M. (after-work). The workplace noise, temperature and physical workload levels were measured as work-related factors. We postulated that the HRV measured at beforework represents the chronic effects and the HRV measured at after-work represents the acute effects of work-related factors. We used generalized linear regression analysis with adjusting for the general characteristics and/or the morning HRV.
RESULTS
The subjects exposed to noise or a hot environment showed increased HRV in the afternoon and decreased HRV in the morning. Machine oil and interpersonal conflict decreased the HRV in the morning, but other chemicals did not show any effect on the HRV. A physical workload decreased the HRV in both the morning and afternoon.
CONCLUSION
The physical and chemical environment, psychosocial stress and a physical workload may affect the autonomic nerve system.

Citations

Citations to this article as recorded by

Factors related to heart rate variability among firefighters
Jae-Hong Shin, Jung-Youb Lee, Seon-Hee Yang, Mi-Young Lee, In-Sung Chung
Annals of Occupational and Environmental Medicine.2016;[Epub] CrossRef
Heart rate variability of students in hospital clinical practice by MBTI character types
Jun-Ho Jung
Journal of the Korea Academia-Industrial cooperation Society.2013; 14(12): 6373. CrossRef

88 View
0 Download
2 Crossref

Original Article

Pulmonary Function Changes of Ozone Exposed Workers in a Film Manufacturing Company: Yoomi Chae, Hyunjoo Kim, Sangchul Roh; Korean Journal of Occupational and Environmental Medicine 2007;19(3):215-222. Published online September 30, 2007; DOI: https://doi.org/10.35371/kjoem.2007.19.3.215

Abstract PDF

OBJECTIVES
To investigate the pulmonary function changes of ozone exposure in Corona and Slitter workers exposed to an ozone level ranging from 0.022~0.061 ppm.
METHODS
Forty-two subjects were exposed for 8hrs to ozone every day. We perfomed pulmonary function testing immediately before and after work and self-administered, portable peak flow meter measurements were self-conducted by the workers over a 5-day (Monday to Friday) period.
RESULTS
Ozone concentrations in the workplace ranging from 0.050~0.061 ppm at Corona and 0.022~0.023 ppm at Slitter in 2006. A small decrement in forced-vital capacity were observed among Corona workers from 93.9% to 91.3% (p=0.012) and also in employment duration below ten years. We found no significant differences in before and after FVC and FEV1 among Slitter workers. All daily (Monday to Friday) peak expiratory flow rates declined in magnitude after two days of ozone exposure, compared with first day exposure.
CONCLUSION
We concluded that daily ozone exposure in the workplace slightly decreased pulmonary function and that PEFR variability is greatest on the 2nd day of ozone exposure.

Citations

Citations to this article as recorded by

A Study of Ozone Variations in a Semiconductor Fabrication Facility and Office Related to the Ozone Concentration in the Outdoor Air
Ji-Eun Lee, Myung-Koo Jung, Kwang-Min Choi
Journal of Korean Society of Occupational and Environmental Hygiene.2016; 26(2): 188. CrossRef

70 View
0 Download
1 Crossref

Original Article

Heart Rate Variability of Carbon Disulfide Poisoned Subjects after Exposure Cessation: Sang Yoon Lee, Sung Il Cho, Do Myung Paek, Chang Bum Byeon, Mi Jeong Kim, Kyung Keun Park, Sang Hyeok Yim, Kil Seung Yang, Chang Kook Hwang, Hyung Joon Jhun; Korean Journal of Occupational and Environmental Medicine 2006;18(2):123-129. Published online June 30, 2006; DOI: https://doi.org/10.35371/kjoem.2006.18.2.123

Abstract PDF: OBJECTIVES
A previous study conducted in 2000 measuring the heart rate variability (HRV) of carbon disulfide (CS2)-poisoned subjects suggested that their HRV was reduced after exposure cessation. However, the study was limited by the following procedural limitations: (1) only 71 CS2-poisoned subjects participated, (2) no females participated, and (3) the CS2-poisoned subjects were older than the controls. This study was therefore conducted to overcome these limitations of the earlier study.
METHODS
The study subjects comprised 122 retired workers with CS2 poisoning and the same number of age- and sex-matched controls. Information on individual age, sex, height, weight, smoking history, alcohol drinking, regular exercise, medical and occupational history, chest x-ray, and ECG recording of the two groups was collected though a self-administered questionnaire and a medical examination. Standard Deviation of NN intervals (SDNN), Root-Mean-Square of Successive Differences (RMSSD), Total Power (TP), Low Frequency (LF), High Frequency (HF), and LF/HF ratio were measured as HRV indices for 5 minutes in the sitting position.
RESULTS
Univariate analysis revealed that all HRV indices of CS2-poisoned subjects were lower than those of the controls. Multiple linear regression analysis showed that CS2 poisoning had negative association with all HRV indices and that its association with RMSSD was statistically significant (P<0.05).
CONCLUSIONS
This study suggests that CS2-poisoned subjects continue to have reduced HRV, even though the exposure has ceased.

44 View
0 Download

Original Article

Sleep Patterns and Morning Heart Rate Variability Among Daytime Workers in Korea: Chang Ho sohn, Min Sook Kim, Hyunjoo Kim, Soo Young Kim, Ji Ho Lee, Hyung Joon Jhun, Jong Min Woo; Korean Journal of Occupational and Environmental Medicine 2005;17(3):208-215. Published online September 30, 2005; DOI: https://doi.org/10.35371/kjoem.2005.17.3.208

Abstract PDF

OBJECTIVES
This study was performed to evaluate the sleep patterns in a population of Korean labor workers and to assess the activity of the autonomic nervous system in relation to sleep habits.
METHODS
A sampler of 1238 daytime workers (male 911, female 327) completed questionnaires on sleep habits and their short term heart rate variability(HRV) was also examined. We used the SA-2000 (medi-core) instrument for 5 minutes for each participant in the morning and performed basic physical examinations including height, weight, and blood pressure.
RESULTS
Bed time and wake up time were negatively correlated with age, while the frequencies of waking up through the night and in the early morning showed positive correlation with age. We found that bed time and wake up time during weekdays, sleep latency during weekdays, frequency of waking up through the night, and the degree of sleepiness all varied significantly according to the average nightly amount of sleep within the last week. There was a positive correlation between wake up time at weekdays with mean heart rate. However, the other variables of sleep habits and pattern did not show significant correlation with HRV.
CONCLUSION
Among Korean daytime workers, sleep phases become advanced with aging. In spite of the aging processes, general sleep health seems to be maintained among the healthy worker group. However, short-term HRV was not useful parameter to measure the alternation of autonomic nervous system resulting from the difference of sleep habits and pattern.

Citations

Citations to this article as recorded by

Effect of Healing Beats Program on Stress, Heart Rate and Sleep Quality of Colorectal Cancer Patients Treated with Chemotherapy: A Randomized Controlled Trial
Eun-Jeong Hong
Asian Oncology Nursing.2024; 24(1): 32. CrossRef
Factors related with quality on sleep of daytime workers
Bu-il Kim, Seong-yong Yoon, Jin-seok Kim, Kuck-Hyeun Woo, Seong-yong Cho, Ho Lee, Jong-min An
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
Temperament and Character Traits, Heart Rate Variability and Occupational Stress in New Nursing Employees
Min Soo Ko, Yong Lee Jang, Jin Sook Choi, Hyun Bo Shim, Hee Jung Nam, Mee Suk Wang, In Deok Lee, Hae Woo Lee
Journal of Korean Neuropsychiatric Association.2016; 55(3): 271. CrossRef

70 View
2 Download
3 Crossref

Original Article

Relationship between Fatigue Severity and Heart Rate Variability in Middle-Aged Male Workers: Sang Wook Song, Jin Hee Shin, Thomas Findley; Korean Journal of Occupational and Environmental Medicine 2005;17(1):26-35. Published online March 31, 2005; DOI: https://doi.org/10.35371/kjoem.2005.17.1.26

Abstract PDF

OBJECTIVES
This study investigated the relationship between the severity of fatigue and the cardiac autonomic function by analyzing the heart rate variability on middle-aged male workers.
METHODS
The severity of fatigue and heart rate variability were assessed with the control measures of age, body mass index, blood pressure, alcohol consumption, smoking history, regular exercise on 82 healthy middle-aged male workers in an annual health checkup. The severity of fatigue was evaluated by the Fatigue Severity Scale (FSS), which was developed by Krupp. The 5-minute electrocardiographic recordings were analyzed as a function of the time and the frequency domain methods of the heart rate variability (HRV). Standard Deviation of the NN intervals (SDNN), Root-Mean-Square of Successive Differences (rMSSD), Total Power (TP), Low Frequency (LF: 0.04~0.15 Hz) power, High Frequency (HF: 0.15-0.4 Hz) power, LF/HF ratio were used as the indices of the HRV. For a comparison of autonomic nervous functions and other variables, the subjects were divided into three fatigue groups based on the FSS score as follows: low (N=31), moderate (N=33), high (N=18) fatigue groups.
RESULTS
There were no significant differences in age, blood pressure, heart rate, body mass index, alcohol consumption, or regular exercise except for the smoking history among the groups. In addition, there were no significant differences in the time domain analysis (SDNN, rMSSD) of HRV among the groups. Spectral analysis of the HRV showed that the mean amplitudes of the HF and LF component were lower in the high fatigue group, whereas there was no significant difference in the LF/HF ratio among the fatigue groups. There were no significant differences in the HRV indices between the smoking and non-smoking groups. No significant interacting effects between the severity of fatigue and smoking on the HRV were observed.
CONCLUSIONS
The association between severe fatigue and the reduced high and low frequency components of the HRV in middle-aged male workers reflects a dysregulation of the cardiac autonomous control. Although the pathophysiological mechanism of this association remains unclear, these results might explain their increased risk for cardiovascular disease. However, these effects need to be confirmed through a well-designed prospective study.

Citations

Citations to this article as recorded by

Impact of Job-stress on Fatigue Among 119 Rescue Workers
Sung-Soo Choi, Gyoung Wan Kim
Journal of the Korea Academia-Industrial cooperation Society.2016; 17(4): 433. CrossRef
The Relationship between Cyber Leisure Activity and Autonomic Function in High School Students
Mi-Eun Son, Na-Hyun Kim
Journal of Korean Biological Nursing Science.2012; 14(1): 33. CrossRef

71 View
0 Download
2 Crossref

Original Article

The Relationship between Heart Rate Variability and Metabolic Syndrome at a Rural Area: Kyoung Bok Min, Jin Young Min, Kyung Hee Jung-Choi, Hyung Joon Jhun, Sung Il Cho, Domyung Paek; Korean Journal of Occupational and Environmental Medicine 2004;16(4):459-466. Published online December 31, 2004; DOI: https://doi.org/10.35371/kjoem.2004.16.4.459

Abstract PDF: OBJECTIVES
The purpose of the present study was to estimate the prevalence of metabolic syndrome and to investigate the relation between metabolic syndrome and heart rate variability in a community population.
METHODS
The study design was cross-sectional, and 1028 subjects, aged 20~87 years, were recruited. Heart rate variability was measured in the sitting position for five minutes. The recorded data were assessed by time-domain (standard deviation of RR interval) and frequencydomain analysis. All subjects were examined for five components of metabolic syndrome.
RESULTS
The prevalence of metabolic syndrome in male and female subjects was 25.9% and 27.7%, respectively. The mean value of heart rate variability of the subjects was significantly different between healthy subjects and those with metabolic syndrome. The regression model showed that metabolic syndrome was negatively correlated with heart rate variability.
CONCLUSIONS
The results demonstrate that metabolic syndrome has potentially negative effects on the cardiovascular system, and that these effects could be detected by heart rate variability. Follow-up studies able to control the cohort effect are necessary to evaluate the relation between metabolic syndrome and heart rate variability.

51 View
0 Download

Original Article

Job Stress, Heart Rate Variability and Metabolic Syndrome: Sei Jin Chang, Sang Baek Koh, Hong Ryul Choi, Jong Min Woo, Bong Suk Cha, Jong Ku Park, Yong Hee Chen, Ho Keun Chung; Korean Journal of Occupational and Environmental Medicine 2004;16(1):70-81. Published online March 31, 2004; DOI: https://doi.org/10.35371/kjoem.2004.16.1.70

Abstract PDF

OBJECTIVE: A growing body of literature has documented that job stress is associated with the development of cardiovascular disease. Nevertheless, the pathophysiological mechanism of this association remains unclear. Therefore, we tried to elucidate the relationship between job stress, heart rate variability and metabolic syndrome.
METHOD
The study design was cross-sectional, and 169 industrial workers were recruited. A structured-questionnaire was used to assess the general characteristics and job characteristics (work demand, decision latitude). Heart rate variability (HRV) was recorded using SA-2000 (medi-core). HRV was assessed by time-domain and by frequency-domain analyses. Time domain analysis was performed for SDNN (Standard Deviation of NN interval), and spectral analysis for low-frequency (LF), high-frequency (HF) and total frequency power. Metabolic syndrome was defined on the basis of clustering of risk factors, when three or more of the following cardiovascular risk factors were included in the fifth quintile: glucose, systolic blood pressure, HDL-cholesterol (bottom quintile), triglyceride and waist-hip ratio.
RESULTS
The results showed that job characteristics were not associated with cardiovascular risk factors. The high strain group had a less favorable cardiovascular risk profile with higher levels of blood pressure, glucose, homocysteine, and clotting factor than the lower strain group (low strain+passive+active group), but the difference was not statistically significant. The SDNN of HRV was significantly lower in the high strain group than in the low strain group. The prevalence of metabolic syndrome in the low strain, passive, active and high strain groups was 9.7%, 13.9%, 14.9% and 23.8%, respectively. In the high strain group, the metabolic syndrome was significantly related to a decreased SDNN. However, we could not find a significant association in LF/HF ratio.
CONCLUSION
This result suggests that decreased HRV does not play a role in the development of disease; however, it can induce cardiovascular abnormalities or dysfunctions related to the onset of heart disease among high risk groups.

Citations

Citations to this article as recorded by

Effect of Gardening Activity Level on Stress Changes in Police Officers
Hye Sook Jang, Yun-Im Kang, Jung Nam Suh, Kyung Hye Seo, Myung Suk Ahn, Doo Young Ryu
Flower Research Journal.2024; 32(1): 40. CrossRef
Analysis of Preference in Plant Fragrances and Psychological Evaluation of Firefighter
Hye Sook Jang, Eunha Yoo, Jeong Hee Kim, Sun-Jin Jeong, Jae Soon Kim, Doo Young Ryu
Journal of People, Plants, and Environment.2021; 24(2): 137. CrossRef
Dynamics of heart activities during moral dilemmas solving by children 4—11 years old
I.M. Sozinova, A.V. Bakhchina, Y.I. Alexandrov
Experimental Psychology (Russia).2017; 10(3): 97. CrossRef
Temperament and Character Traits, Heart Rate Variability and Occupational Stress in New Nursing Employees
Min Soo Ko, Yong Lee Jang, Jin Sook Choi, Hyun Bo Shim, Hee Jung Nam, Mee Suk Wang, In Deok Lee, Hae Woo Lee
Journal of Korean Neuropsychiatric Association.2016; 55(3): 271. CrossRef
Relation of Health Promotion Behaviors and Metabolic Syndrome in Daytime Workers
Dae-Sik Ko, Bu-Yeon Park, Gyeong-Hyu Seok
The Journal of the Korea institute of electronic communication sciences.2013; 8(12): 1941. CrossRef
Occupational Diseases among Office Workers
Jung-Wan Koo
Hanyang Medical Reviews.2010; 30(4): 274. CrossRef

112 View
4 Download
6 Crossref

Original Article

The Association of Carbon Disulfide Poisoning with Heart Rate Variability: Hyung Joon Jhun, Sang Hyuk Yim, Do Myung Paek; Korean Journal of Occupational and Environmental Medicine 2004;16(1):48-56. Published online March 31, 2004; DOI: https://doi.org/10.35371/kjoem.2004.16.1.48

Abstract PDF: OBJECTIVES
Mass poisoning by carbon disulfide (CS2) occurred in a viscose rayon factory in Korea. Up until 1998, 830 employees, including 38 who had died, were diagnosed with CS2 poisoning. Among the CS2 poisoned subjects, heart rate variability (HRV) was evaluated to investigate whether the toxic effect of CS2 persists after the exposure has ceased. The dose-response relationship between carbon disulfide exposure and HRV was also evaluated.
METHODS
The case group was comprised of 71 retired male workers diagnosed as being CS2 poisoned. The control group was comprised of 127 males of same age-range who had no history of CS2 exposure and cardiovascular diseases. Information on individual age, height, weight, cigarette smoking, alcohol drinking, regular exercise, medical and occupational history, chest x-ray, and ECG recording of the two groups were collected through a self-administered questionnaire and with a medical examination. Time (maximum, average, minimum RR interval) and frequency domain measures (low frequency - LF, high frequency - HF, total power spectrum TPS, and LF/HF ratio) of the two groups were analyzed. CS2 exposure indices of the case group (duration of employment, exposure level per work department, cumulative exposure index and duration of retirement) were investigated.
RESULTS
Using a univariate analysis, the frequency domain measures for the case group were significantly lower than those in the control group, except for HF. In the multivariate analysis, previous history of CS2 poisoning was inversely related to all frequency domain parameters and it significantly affected the LF (p<0.05) and the LF/HF ratio (p<0.05). There was no significant dose-response relationship between CS2 exposure indices and HRV parameters in the case group.
CONCLUSION
This study suggests that further studies are necessary to evaluate the residual effects of CS2 poisoning even after the CS2 exposure has ceased.

53 View
1 Download

Original Article

The Effects of Job Stress on the Autonomic Nerve Activity of Workers in Manufacturing Industry: Ki Jung Yoon, Mi Na Ha, Jai Young Kim, Sang Yun Lee, Hyoung June Im, Ae Sun Shin, Seung Sik Hwang, Jeong Soo Kim, Dae Hee Kang, Soo Hun Cho; Korean Journal of Occupational and Environmental Medicine 2002;14(3):280-287. Published online September 30, 2002; DOI: https://doi.org/10.35371/kjoem.2002.14.3.280

Abstract PDF: OBJECTIVE: A cross-sectional study was conducted to evaluate the relationships between autonomic nerve activity (i.e., heart rate variability and urinary catecholamines) and job stress.
METHODS
The study was conducted on 134 workers from a company producing consumer goods (i.e., diaper, paper towel) located in Cheonan, Korea. Job stress was assessed by Karasek's Job Content Questionnaire (JCQ). Autonomic function was assessed by heart rate variability (HRV) and urinary catecholamines (epinephrine, norepinephrine, and dopamine). Urine samplings, and measurings of HRV, were repeated three times for each shift. Information on demographic characteristics, previous job histories, past medical history, smoking and drinking were also collected.
RESULTS
No statistically significant differences were observed in any HRV and urinary catecholamines among the four groups, which were categorized by the Job Strain Model. When data were stratified by work duration, low field HRV was borderline significantly higher in the high strain group in individuals with a shorter work duration (<48.5 months, N=28, p-value of 0.92 by analysis of variance).
CONCLUSIONS
Neither HRV nor urinary catecholamines are significantly associated with job stress, as assessed by the Karasek's JCQ. However, HRV seems to be a potential physiological indicator of job stress only in the workers with a shorter work duration.

56 View
0 Download

Original Article

The Similar Exposure Group and Exposure Variation in Ship-Building Painters: Focused on Xylene Exposure: Sang Baek Koh, Young Man Roh, Hyeon Woo Yim, Yong Chul Shin, Soo Keun Kim, Hong Ryul Choi, Jai Young Kim, Soung Hoon Chang; Korean Journal of Occupational and Environmental Medicine 2001;13(4):413-422. Published online December 31, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.4.413

Abstract PDF

OBJECTIVES
This study was conducted to assess the concentration of xylene exposure and exposure variability of a similar exposure group(SEG) in accordance with job title and confined space.
METHOD
The study subjects included 28 workers working in the painting process in the ship-building industry. Measurement of subjects were repeated three times. Within and between-worker exposure variance components were estimated from log-transformed exposure concentrations employing a one-way nested random effects analysis of variance model. A uniformly exposed group was defined as one where the between-worker variance(sigmaB2) was less than or equal to 0.031 or bwR95 RESULT
The results indicated that, contrary to popular belief, similar exposed groups based on job title were heterogeneous. The between-worker variance(sigmaB 2) is large(>or=0.031) and the ratios of the 97.5th and 2.5th percentile workers of the log normally distributed exposures of each group of workers was more than 2. However dividing job title into confined space(in-block, out-block, in/out-block) decreased the between-worker exposure variability.
CONCLUSION
This study focused on the quantitative aspects of exposure in painters in the ship-building industry. We cannot accept the assumption that SEG are uniformly exposed, as a major component of variation in exposure relates to differences in tasks or other factors. Therefore, the observational schemes can be improved by investigating jobspecific task and practice.

Citations

Citations to this article as recorded by

Overview of occupational cancer in painters in Korea
Jun-Pyo Myong, Younmo Cho, Min Choi, Hyoung-Ryoul Kim
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
The Work Environment and Wearing Conditions of Industrial Protective Clothing in Shipbuilding Workshops
Hyun-Sook Bae, Min-Young Kim
Journal of the Korean Society of Clothing and Textiles.2012; 36(5): 512. CrossRef

72 View
0 Download
2 Crossref

Original Article

Influence of Shiftwork Duration on Blood Pressure and Heart Rate Variability in Short Rotating 8-hour Shiftworkers: Mi Na Ha, Jai Young Kim, Jung Sun Park, Ho Keun Chung; Korean Journal of Occupational and Environmental Medicine 2001;13(2):180-189. Published online June 30, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.2.180

Abstract PDF

OBJECTIVES
This study was performed to investigate the chronic health effect of shiftwork on cardiovascular system.
METHODS
We checked blood pressure(BP) and heart rate variability(HRV) at every shift on 134 male workers whose shift type was 8-hour and short rotating of 3 days shift interval. As confoundings, job stress was measured by Karasek's JCQ 49 items questionnaire and circardian type was assessed by morningness-eveningness questionnaire. Smoking and alcohol drinking habit, marital status and past medical history were also acquired. We used the method of repeated measured data analysis with mixed model to show the association between shiftwork duration and BP or HRV.
RESULTS
Average age of workers was 29 years olds(range 25~44). Among them, 77.9 % were current smokers, 50 % were the passive type of job strain in Karasek's model. Mean shiftwork duration was 5.21 years(range 5.4 months~10 years). In circadian type, no one was definitely morning type or definitely evening type. In multivariate analyses adjusted by age, job strain, shift, circadian rhythm and smoking, blood pressure were showed significantly increasing trends according to shiftwork duration in both systolic and diastolic(p<0.05). Heart rate variability were also showed significantly decreasing trends according to shiftwork duration in both parasympathetic and sympathetic functions(p<0.05).
CONCLUSIONS
The results of this studs suggests the chronic negative health effect of shiftwork on cardiovascular system.

Citations

Citations to this article as recorded by

Association between serum ferritin and hypertension according to the working type in Korean men: the fifth Korean National Health and nutrition examination survey 2010–2012
Dong-Hoon Lee, Seong-Kyu Kang, Won-Jun Choi, Kyeong Min Kwak, Dukyun Kang, Sang Ha Lee, Jun-Hyung Lee
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
Effect of shift work on hypertension: cross sectional study
Jeong Han Yeom, Chang Sun Sim, Jiho Lee, Seok Hyeon Yun, Sang Jin Park, Cheol-In Yoo, Joo Hyun Sung
Annals of Occupational and Environmental Medicine.2017;[Epub] CrossRef
The Immediate Effects of Foot-bath at Diverse Temperatures on the Stress of Students in the Department of Physical Therapy who Experience Clinical Practice
Han-Ki Shin, Jong-Ho Kang
Journal of the Korean Society of Physical Medicine.2016; 11(1): 107. CrossRef
Effect of working patterns on eating habits in manufacturing workers of Gwangju area
Ji-Suk Yim, Young-Ran Heo, Eun Jeong, Jae-Joon Lee
Journal of Nutrition and Health.2016; 49(6): 495. CrossRef
The Effect of the Physical Therapy Treatment Room Environment Using Microwave Diathermy on the Autonomic Nervous System of Human Body
Han-Ki Shin, Tae-Kyu Lee, Je-Yoon Jun, Ju-Seung Kim, Jong-Ho Kang
Journal of the Korean Society of Physical Medicine.2015; 10(1): 37. CrossRef
Occupational Stress of Women Workers in Service Industries depending on Their Working Conditions
Su-Jin Kwak, Hye-Sun Jung
Korean Journal of Occupational Health Nursing.2014; 23(2): 89. CrossRef
The Relationship between Anxiety, Depression and 24-hour Ambulatory Blood Pressure in Hotel Employees
Jun-Ho Bae, Jeong-Kyu SaKong, Sang-Kyu Kim
Journal of agricultural medicine and community health.2011; 36(3): 157. CrossRef

56 View
0 Download
7 Crossref

Original Article

Lung Function Test for Workers and its Quality Control Program: Jung Keun Choi, Mi A Son, Hyun Kyung Kim, Domyung Paek, Byung Soon Choi; Korean Journal of Occupational and Environmental Medicine 1994;6(2):187-200. Published online September 30, 1994; DOI: https://doi.org/10.35371/kjoem.1994.6.2.187

Abstract PDF: Lung function test can be influenced by technical as well as biological variables, and the quality control of test has been stressed as an important part of lung function test program. This study was done to survey the current status of lung function test program in workers' health examination, and examine the variablity of test results when quality control is not achieved. Forty nine Workers' Health Examination Institutes and 7 Pneumoconiosis Referal Centers were surveyed for their current lung function tests, types of spirometers, and performance of technicians. To examine the effect of quality control program of lung function tests on the variablity of test results, 118 miners were tested under a quality control guideline and the results were compared to those obtained ignoring 4 major areas of the guideline-spirometer calibration, minimum number of tests per session, suitable prediction equations, and selection process of final results for each tested subjects. Among surveyed Institutes and Centers, only 38%(20/53) are performing any calibration of spirometers, and most of those calibrations are done automatically by the machine. All the surveyed Institutes and Centers obtain acceptable test no more than 2 times. The background of technicians include office workers and nurse aids without an adequate training in pulmonary physiology, and the testing posture and formats vary among Institutes and Centers. When the types of pulmonary dysfunction under the definition of the Ministry of Labor were compared between those obtained with and without quality control guidelines, spirometer calibration affected the test results in 6(5.1%) out of 118 subjects. The change in the minimum number of adequate tests from 1 to 3 and more brought changes in 19(16.1%) subjects. The test results of 9(7.6%) subjects differed between two different prediction equations, and the results of 7(5.9%) subjects differed between two different selection process of final results. The current practice of lung function tests of workers needs quality control programs, and the results of this study indicate that the first remedy should be to bring the minimum number of acceptable test to more than 3.

43 View
0 Download

First
Prev
Page of 1
Next
Last

Search