Cardiovascular load during summer work of two age groups of van-rickshaw pullers in West Bengal, India (original) (raw)
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International Journal of Occupational Safety and Health, 2012
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Physical load on the cardiovascular system in different work tasks
Scandinavian Journal of Work, Environment & Health, 1984
This review of the cardiovascular load at work is based on the concept of stress and strain in dynamic work. The relationship between oxygen consumption (VO,) and heart rate (HR) and work load and the effects of intervening variables are described. The relationship between relative aerobic strain (RAS) and HR is shown to be dependent on the type and combination of muscular work. Significant differences in cumulative HR curves over 8-h shifts have been detected between the profile groups "producing muscle forces" or "coordinating motor functions" and others; the HR remained above the level of 110 beats. min-I for about 50, 30, and 5 % of the shift time, respectively. VO,, HR, and RAS are described in more detail during tasks in milk delivery, mail delivery, and logging, during tasks in the construction and steel industries, and during tasks in the municipal sector. Special attention is paid to work tasks in which the load on the cardiovascular system is above the "acceptable" level. Peak loads which increase strain to the maximal RAS level are described. The change in RAS with ageing is shown to increase in work tasks which include the production of muscle forces and the coordination of motor functions.
Cardiac strain of confectionery worker in relation to heat exposure during regular work shift
Indian Journal of Occupational and Environmental Medicine, 2011
Context: In India, a wide variety of occupations are performed in adverse indoor working environment. Work physiological studies in these jobs are scanty as compared to investigations done on more arduous outdoor occupations. Aims and Objectives: Physiological strain of workers engaged in sweet making activities was assessed in terms of cardiac strain indices in relation to heat stress. Setting and Design: 33 full-time workers from eastern India were compared for cardiac strain profile obtained during summer and winter during their regular work shift. A comparison was also done in between younger (n=12) and older (n=16) subjects. Materials and Methods: Working heart rate (WHR) was recorded continuously during work. The pulse deceleration index (PDI) was obtained from recovery heart rate (RHR). Net cardiac cost (NCC) and relative cardiac cost (RCC) were the main indices used to evaluate physical strain. Thermal stress assessed from wet bulb globe temperature (WBGT). Statistical Analysis: Students' t-test and Wilcoxon signed rank paired tests were used for comparing physiological responses. Values were considered significant when P < 0.05. Results: Work load was significantly higher in summer for all workers. RCC of younger workers in winter and summer ranged between 18% and 26%. This was significantly lower as compared to the RCC of older workers which was 27% in winter and 30% in summer. The physiological workload appeared to be moderate in nature. The WBGT index was above the recommended range in summer for both the groups. Older workers showed a no recovery pattern in terms of recovery pulse that indicated toward a cumulative stress which may be attributed to a combined effect of heat and work in summer and extra amount of work performed in winter season. Conclusion: The physical workload is aggravated with various ergonomic stressors present in the work place. An ergonomic intervention has been indicated as further scope of this study.
Journal of human ergology, 2006
Cardiovascular load of underground shovelers was assessed in terms of heart rate changes at work in haulage coalmines. Twenty underground shovelers of two different age groups (those of age 31-39 and those of age 40-49) served as subjects. Working heart rate was significantly higher (p < 0.01) in the older group (138.2 beats/min) than in the younger group (130.4 beats/min). Though the net cardiac cost did not differ significantly between the groups (64.8 beats/min and 69.4 beats/min in younger and older groups, respectively), difference in the relative cardiac cost (54.17% and 64.86% in younger and older groups, respectively) proved to be highly significant (p < 0.001). The heart rate up to the third minute of recovery showed significant differences between the groups (p < 0.01). While analysis of physiological responses indicated that the task was very strenuous irrespective of age, cardiac strain was found to be more excessive in the older subjects if continued. The arduo...
https://www.ijhsr.org/IJHSR\_Vol.8\_Issue.5\_May2018/IJHSR\_Abstract.022.html, 2018
Driving bus in an urban area is a demanding job and requires tremendous amount of physical and mental stability to perform the task with minimal hazards. Bus drivers are under continuous stress during the working hours and are prone for many diseases related to the changes induced by stress, especially cardiovascular disorders. Study Objective: To evaluate cardio-respiratory fitness using three min step test and prediction of future risk of CAD using IPAQ, ACSM risk factor stratification scoring in public transport bus drivers of Mumbai and Navi Mumbai. Methodology: 100 public transport bus drivers were included according to inclusion and exclusion criteria between the age group of 25-55 years. Bus drivers were interviewed for IPAQ questionnaire, ACSM risk factor stratification scoring and perceived stress scale. Cardio-respiratory fitness was evaluated and the recovery heart rate was recorded. Spearman's correlation test was carried out using SPSS (version16). Result: Our study revealed strong positive correlation between three (3) minute step test recovery heart rate and ACSM risk factor stratification scoring (r=0.803, p=0.00), derived Vo2max and IPAQ (r=0.588,p=0.00)and strong negative relation between 3 min step test recovery heart rate and IPAQ (r=-0.589,p=0.00), derived Vo2max and ACSM risk factor stratification scoring (r=-0.788,p=0.00), ACSM risk factor stratification scoring and IPAQ (r=-0.719,p=0.00). Conclusion: Our study demonstrated a moderately high prevalence (93%) of CAD risk factors amongst bus drivers of Mumbai and Navi Mumbai. Sedentary life style was found to be the commonest risk factor amongst the entire study population followed by stress, smoking and dyslipidemia.
2019
Occupational health hazard is a very common term in every emerging country. Along with the unorganized sector, most organized sectors including government industries are suffering from this affliction. In addition to workload, the seasonal changes also have some impacts on working environment. With this focus in mind, one hundred male industrial workers, who are directly involved to the task of Periodic Overhauling (POH) in a fabricating workshop in the public domain are selected for this research work. They have been studied during work periods throughout different seasons in a year. For each and every season, the participants working heart rate (WHR) is measured and compared with the standards given by different national and internationally recognized agencies i.e., World Health Organization (WHO) and American Conference of Governmental Industrial Hygienists (ACGIH) etc. The different environmental parameters i.e. dry bulb temperature (DBT), wet bulb temperature (WBT), globe tempe...
The Correlation between Physical Workload and the Increase in Workers’ Pulse Rate
The Indonesian Journal of Occupational Safety and Health
Introduction: The workload that exceeds individual work capacity will increase the pulse rate rapidly. The purpose of this research was to study the correlation between physical workload and the increase in workers’ pulse rate. Methods: This research utilized cross-sectional design by using the observational method with 23 workers from the BRF area of PT X Sidoarjo as respondents. This research was conducted by conducting the direct observation by calculating the workload received by the worker by using %CVL method and calculating the resting and working heart rates. Results: The result showed that all workers were male and had the productive age distribution of 60.9% in the age range of 25-50 years. Based on the calculation of workload, the majority of workers have the workload on the moderate %CVL category, amounting to 56.5%. Based on the measurement of the resting and working heart rates, it was found that all workers experienced the pulse rate increase. Based on the result of P...
Cardiac Strain between Normal Weight and Overweight Workers in Hot/Humid Weather in the Persian Gulf
International journal of preventive medicine, 2013
In hot weather, overweight and obesity are considered as significant risk factors for the incidence of cardiac strain in workers. This study was aimed to compare cardiac strain among overweight and normal-weight workers in hot, humid conditions in the south of Iran. This cross-sectional study was conducted on 71 workers in the south of Iran in summer 2010. The heart rate was measured at rest and at actual work. Cardiac strain based on working heart rate (WHR), the relative cardiac cost (RCC), the net cardiac cost (NCC), load relative cardiovascular (CVL), and heart rate reduction was analyzed in 35 normal-weight people (body mass index (BMI) <25 kg/m(2)) and 36 overweight people (BMI >25 kg/m(2)) using descriptive statistics. In 42% of the total workers, BMI was >25 kg/m(2). The average of Wet Bulb Globe Temperature Index (WBGT Index) in the two groups was not significantly different. The mean WHR in the two groups was 101 ± 20.3 and 112 ± 18.9, respectively (P = 0.026). Pe...
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International Journal of Environmental Research and Public Health, 2016
This study aimed to elucidate cardiovascular loads (CVL) in construction workers during work and leisure by relative heart rate (RHR) over several days. Furthermore, we sought to evaluate the level of CVL in relation to individual factors, work ability, musculoskeletal pain and subjective general health. From a group of 255 construction workers responding to the baseline questionnaire, the CVL during work and leisure time was determined by recording RHR in 42 workers over 3-4 days. Almost 60% of the workday was spent below 20% RHR. The mean RHR during work for all participants was 16% RHR, with large differences between professions. On average, the 42 workers spent 14% of the workday at a RHR above 33%, and four subjects (10%) had a mean RHR above 33% during work. Eight (19%) of the participants had a mean length of their workday exceeding calculated maximal acceptable work time. Seven persons (17%) experienced on average one or more episode(s) of 5 min or more continuously above 33% RHR. The cardiovascular load at work was significantly associated with age andVO 2max , but not with work ability, musculoskeletal pain or subjective general health.
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