Heart rate strain in cable hauler choker setters in New Zealand logging operations.

This study examined the physical strain experienced by cable hauler choker setters, and the applicability of heart rate indices for measuring physical strain in commercial forest harvesting operations in New Zealand. The heart rate of four choker setters were recorded continuously throughout the working day and applied to heart rate indices. Based on the relative heart rate at work (%HRR), ratio of working heart rate to resting heart rate and 50% level indices, the mean working heart rate (HRw) of 106 bt. min(-1) +/- 6.9 (mean +/- SD) placed choker setting in the moderate workload category. The specific tasks of line shifts (120.3 +/- 4.8 bt. min(-1)), hooking up drags (118.8 +/- 6.6 bt. min(-1)) and uphill travel (126.1 +/- 12.9 bt. min(-1)), imposed the most severe workloads on the choker setters. This research also demonstrated that heart rate indices could be used as an effective means of determining the physiological strain of subjects working in New Zealand's commercial forest harvesting operations.

[1]  V. González,et al.  Cardiac frequency throughout a working shift in coal miners. , 1995, Ergonomics.

[2]  Patrick Kirk,et al.  Heart rate strain in New Zealand manual tree pruners , 1996 .

[3]  V. Louhevaara,et al.  Energy expenditure and clearing snow: a comparison of shovel and snow pusher. , 1995, Ergonomics.

[4]  Kåre Rodahl,et al.  Physiology Of Work , 1989 .

[5]  A J van der Beek,et al.  Physical workload of lorry drivers: a comparison of four methods of transport. , 1995, Ergonomics.

[6]  D. Minard,et al.  Physiological evaluation of industrial heat stress. , 1971, American Industrial Hygiene Association journal.

[7]  Mark J.M. Sullman,et al.  An Ergonomic Assessment of Manual Planting Pinus Radiata Seedlings , 2000 .

[8]  R Goldsmith,et al.  The cost of work in medical nursing. , 1978, Ergonomics.

[9]  Jerry D. Ramsey,et al.  Threshold values for the Botsbali: A field study of occupational heat , 1982 .

[10]  P. Vogelaere,et al.  Validation du Sport Tester PE 3000 en fonction de l'enregistrement Holter , 1987 .

[11]  P Kirk,et al.  The effect of spiked boots on logger safety, productivity and workload. , 1994, Applied ergonomics.

[12]  L Léger,et al.  Heart Rate Monitors: Validity, Stability, and Functionality. , 1988, The Physician and sportsmedicine.

[13]  A Vitalis,et al.  Heart rate strain indices in Greek steelworkers. , 1994, Ergonomics.

[14]  D. Reid,et al.  Spine Trauma Associated With Off-Road Vehicles. , 1988, The Physician and sportsmedicine.

[15]  J H Botsford.  A wet globe thermometer for environmental heat measurement. , 1971, American Industrial Hygiene Association journal.

[16]  V. Candas,et al.  Heart rate and spontaneous work-rest cycles during exposure to heat. , 1983, Ergonomics.

[17]  J. Karvonen,et al.  Comparison of Heart Rates Measured by ECG and Microcomputer , 1984 .

[18]  O. Lammert.  Maximal aerobic power and energy expenditure of Eskimo hunters in Greenland. , 1972, Journal of applied physiology.

[19]  P. Åstrand,et al.  Textbook of Work Physiology , 1970 .

[20]  Igor B. Mekjavic,et al.  Environmental ergonomics : sustaining human performance in harsh environments , 1988 .