Abstract
Every fire fighter needs to wear fire-protective clothing and a self-contained breathing apparatus (SCBA) several times a year while carrying out various fire-fighting and rescue operations in hazardous work environments. The aim of the present study was to quantify the effects of a multilayer turnout suit designed to fulfil European standard EN 469 used over standardized (Nordic) clothing and with SCBA (total mass 25.9 kg) on maximal physical work performance, and to evaluate the relationship between individual characteristics and power output with the fire-protective clothing system and SCBA. The subjects were 12 healthy firemen aged 26–46 years. The range of their body mass, body fat and maximal oxygen consumption was 69–101 kg, 10–20% and 2.70–5.86 1·min−1, respectively. The maximal tests without (control) and with the fire-protective clothing system and SCBA were carried out on a treadmill in a thermoneutral environment. When compared to the control test, the decrease in the maximal power output in terms of maximal working time and walking speed averaged 25% (P < 0.001) varying from 18% to 34% with the fire-protective clothing system and SCBA. At maximum, no significant differences were found in pulmonary ventilation, absolute oxygen consumption, the respiratory exchange ratio, heart rate, systolic blood pressure, the rate-pressure product, mechanical efficiency, and the rating of perceived exertion between the tests with and without the fire-protective clothing system and SCBA. The reduction of the power output was related to the extra mass of the fire protective clothing and SCBA. In this study, robust build and parameters associated with good anaerobic capacity were the most powerful individual characteristics contributing to the smallest drop in the power output with the fire-protective clothing system and SCBA. All possible means to decrease the mass of both the fire-protective clothing system and SCBA for maintaining the sufficient power output in physically demanding fire-fighting and rescue tasks need to be considered.
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References
Borg G (1970) Perceived exertion as an indicator of somatic stress. Scand J Rehabil Med 2:92–98
Borghols EAM, Dresen MH, Hollander AP (1978) Influence of heavy weight carrying on the cardiorespiratory system during exercise. Eur J Appl Physiol 38:161–169
Davis PO, Biersner RJ, Barnard RJ, Schamadan J (1982) Medical evaluation of fire fighters. How fit are they for duty? Postgrad Med 72:241–248
Declaration of Helsinki. Recommendations guiding medical doctors in biomedical research involving human subjects. Adopted by the 18th World Medical Assembly, Helsinki, Finland, 1964, and as revised by the 29th World Medical Assembly, Tokyo, Japan, 1975. (1976) Med J Australia 1:206-207
Durnin JV, Rahaman NM (1967) The assessment of amount of fat in human body from measurement of skinfold thickness. Br J Nutr 21:681–689
European Standard, final draft, EN 469 (1994) Protective clothing for fire fighters. August 1994, European Committee for Standardization, Brussels
Ilmarinen R, Mäkinen H (1992) Heat strain in fire-fighting drills. In: Lotens WA, Havenith G (eds) Proceedings of the fifth International Conference on Environmental Ergonomics. TNO-Institute for Perception, Maastricht, pp 90–91
Ilmarinen R, Griefahn B, Könemund C, Mäkinen H (1993) Belastung und Beanspruchung von Feuerwehrleuten im simulierten Einsatz. In: Triebig G, Stelzer O (eds) Bericht über die 33. Jahrestagung der Deutschen Gesellschaft für Arbeitsmedizin und Umweltmedizin e.V., Geutner Verlag, Stuttgart, pp 259–263
Ilmarinen R, Griefahn B, Mäkinen H, Künemund C (1994) Physiological responses to wearing a fire fighter's turnout suit with and withouit microporous membrane in the heat. In: Frim J, Ducharme MB, Tikuisis P (eds) Proceedings of Sixth International Conference on Environmental Ergonomics. Government of Canada, Montebello, pp 78–79
Louhevaara V, Lusa S (1992) Guidelines on the follow-up of the firefighters' work ability. In: Ilmarinen J (ed) Aging and work. Proceedings of the International Symposium on Aging and Work. Finnish Institute of Occupational Health and International Commission on Occupational Health, Helsinki. Finnish Institute of Occupational Health, Vantaa, pp 134–141
Louhevaara V, Smolander J, Tuomi T, Korhonen O, Jaakkola J (1985) Effects of an SCBA on breathing pattern, gas exchange, and heart rate during exercise. J Occup Med 27: 213–216
Louhevaara V, Smolander J, Korhonen O, Tuomi T (1986a) Maximal working times with a self-contained breathing apparatus. Ergonomics 29:77–85
Louhevaara V, Smolander J, Korhonen O, Tuomi T (1986b) Effects of industrial respirators on breathing pattern at different work levels. Eur J Appl Physiol 55:142–146
Lusa S, Louhevaara V, Smolander J, Pohjonen T, Uusimäki H, Korhonen O (1993) Thermal effects of fire-protective equipment during job-related exercise protocol. SAFE 23:36–39
Lusa S, Louhevaara V, Kinnunen K (1994) Are the job demands on physical work capacity equal for young and aging firefighters? J Occup Med 36:70–74
Manning JE, Griggs TR (1983) Heart rates in fire fighters using light and heavy breathing equipment: similar near-maximal exertion in response to multiple work load conditions. J Occup Med 25:215–218
Mäkinen H, Ilmarinen R, Griefahn B, Künemund C (1995) Physiological comparison of fire fighters turn out suits with and without a microporous membrane in the heat. In: Johnson JS, Mansdorf SZ (eds). American Society for testing and materials, Philadelphia (in press)
Nunneley SA (1989) Heat stress in protective clothing. Scand J Work Environ Health 15 [Suppl 1]:52–57
Raven PB, Shafer CL, Linneburg AC (1977) Maximal stress test performance while wearing a self-contained breathing apparatus. J Occup Med 19:802–806
Smolander J, Lusa S, Louhevaara V, Koski T, Uusimäki H, Korhonen O (1991) Evaluation of a job-related treadmill test for the assessment of fire fighters' work capacity. In: Karwoski W, Yates JW (eds) Advances in industrial ergonomics and safety III. Taylor and Francis, New York, 505–512
White MK, Hodus TK (1987) Reduced work tolerance associated with wearing protective clothing and respirators. Am Ind Hyg Assoc J 48:304–310
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Louhevaara, V., Ilmarinen, R., Griefahn, B. et al. Maximal physical work performance with European standard based fire-protective clothing system and equipment in relation to individual characteristics. Europ. J. Appl. Physiol. 71, 223–229 (1995). https://doi.org/10.1007/BF00854982
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DOI: https://doi.org/10.1007/BF00854982