Cardiac strain and energy ezpenditure in inland fishing activities
In the context of scanty work physiological studies focusing physiological strain of inland fishermen, the present study aimed at evaluating the cardiac strain and energy expenditure of 20 inland fishermen (mean age 35.4 ± 11.4 range 20 - 55 years) engaged in a special type of inland fishing job performed by seine in large water reservoirs known as ‘beel in local parlance. Physical strain was evaluated in 3 types of fishing activities: Net Spreading (NS), Net Pulling (NP) and Catch Handling (CH) and as well as for 2 ‘work pattern groups based on fixed task assignment: one group performed net spreading followed by net pulling and finally catch handling (NS-NP-CH) and the other group was involved in net pulling followed by catch handling (NP-CH). Mean values of physiological parameters in different fishing tasks varied from 2.1 - 3.6 kcal/min for energy expenditure (EE), from 19％ to 33％ for relative aerobic strain (RAS) and from 97 - 112 beats/min for working heart rate (WHR). Physiological responses were highest for net-pulling, lowest for net-spreading, and intermediate for catch-handling. Evaluation of workload in the whole work shift in relation to work patterns revealed that physical strain for ‘NS-NP-CH group was significantly higher than the NPCH counterpart. It was found that the nature and duration of different activities had influenced the magnitude of the physiological reactions to work. Continuous and much longer duration of work period with minimum rest pauses was responsible for elevated physiological response obtained for the ‘NS-NP-CH group. The intensity of workload for two groups ranged between heavy to ‘moderate in accordance with certain scales of heaviness based on different physiological parameters. Although the average energy demand appeared to be within the acceptable range yet indications of cumulative stress was conspicuous for some fishermen. Hence well -planned job rotation scheme can therefore be implemented so that an even distribution of workload can be achieved and overall workload could be reduced.
Inland fishing relative aerobic strain relative cardiac cost net cardiac cost energy ezpenditure
Biswas R Samanta A
Universal College of Medical Sciences, Bhairahawa, Nepal All India Institute of Hygiene and Public Health, Kolkata, India
国际会议
17th World Congress on Ergonomics(第十七届国际人类工效学大会)
北京
英文
1-7
2009-08-09（万方平台首次上网日期，不代表论文的发表时间）