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标题：Does body posture during tree felling influence the physiological load of a chainsaw operator?
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作者：Witold Grzywiński ; Tomasz Jelonek ; Arkadiusz Tomczak 等
期刊名称：Annals of Agricultural and Environmental Medicine
印刷版ISSN：1232-1966
电子版ISSN：1898-2263
出版年度：2017
卷号：24
期号：3
页码：401-405
DOI：10.5604/12321966.1235177
出版社：Institute of Agricultural Medicine in Lublin
摘要：Introduction and Objectives. Holding determined body postures during work is connected with muscles activity. The moreforced the posture, the larger the number of muscles taking an active part in holding and stabilizing the work posture.During logging, the greatest share of awkward (forced) working postures occurs in tree felling by chainsaw.Materials and Method. A group of 10 experienced fellers aged 47.5±7.3 (37 – 59-years-old) was studied. Heart rate (HR) wasmeasured during simulation of felling activity in 4 working postures: back bent forward with straight legs (stoop), backbent forward with bent legs (flexed-stoop), squat and kneeling on one knee (half-kneel).Results. The lowest value of HR was noticed for squatting – 114.1 bpm, then for kneeling on one knee – 116.3 bpm. HR duringfelling in a standing posture with straight legs amounted to 121.5 bpm and for standing with bent legs 125.3 bpm. For allstudied postures the differences in average HR values were statistically significant at p<0.01.Conclusions. A working posture during tree felling by chainsaw has influence on the level of physiological workload of anoperator. Standing bent forward body postures cause higher heart response than squatting and half-kneeling.
关键词：working posture; heart rate; forestry; feller; felling