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The physiological demands of horseback mustering when wearing an equestrian helmet

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Abstract

The hottest months on northern Australian cattle stations are from September to November, and it is during these months that horseback cattle mustering occurs. Stockmen wear clothing that restricts heat loss, and protective helmets have recently been introduced. Anecdotal evidence points to the possibility that helmets may increase the probability of developing heat illness, or reducing workplace performance. In this project, we quantified the working (thermal) environment on such cattle stations, and measured the metabolic demands on, and concurrent physiological strain in stockmen during mustering, whilst wearing an equestrian helmet. During horseback work, the average heart rate was 102.0 beats min−1 (SD 14.0), with almost 90% of the time (238 min) spent working at intensities <50% of the heart rate reserve. The projected metabolic heat production during mustering ranged between 178 and 333 W (women), and between 212 and 542 W (men). The average core temperature was 37.6°C, while the mean skin temperature averaged 34.1°C. It was concluded that the working environment is, on average, thermally uncompensable during the mustering season. However, horseback mustering per se is a relatively low-intensity activity, interspersed with short periods of high-intensity work. This activity level was reflected within core temperatures, which rarely climbed above values associated with light-moderate exercise. Thus, whilst the climatic state was uncompensable, stockmen used behavioural strategies to minimise the risk of heat illness. Finally, it was observed that the helmet, though unpleasant to wear, did not appear to increase thermal strain in a manner that would disadvantage stockmen.

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References

  • Armstrong LE, Maresh CM, Castellani JW, Bergeron MF, Kenefick RW, LaGasse KE, Riebe D (1994) Urinary indices of hydration status. Int J Sport Nutr 4:265–279

    PubMed  CAS  Google Scholar 

  • Armstrong KA, Senakham T, Fogarty AL, Taylor NAS (2002) Physiological and manikin-based assessment of firefighter helmets. UOW-HPL-Report-011. Human Performance Laboratories, University of Wollongong. For: NSW Fire Brigades, Sydney, Australia, pp 1–46

  • AS/NZS 3838:2006. (2006) Helmet for horse riding and horse-related activities. Standards Australia, G.P.O. Box 476, Sydney, NSW 2001, Australia

  • Australian Bureau of Meteorology. Web site: http://www.bom.gov.au/climate/averages/tables/cw_014825.shtml

  • Brühwiler PA (2007) Radiant flow through bicycle helmets: a thermal manikin study. In: Mekjavic IB, Kounalakis SN, Taylor NAS (eds) Environmental ergonomics XII. Biomed d.o.o., Ljubljana, Slovenia. ISBN 978-961-90545-1-2, pp 425–428

  • Brühwiler PA, Buyan M, Huber R, Bogerd CP, Sznitman J, Graf SF, Rösgen T (2006) Heat transfer variations of bicycle helmets. J Sports Sci 24:999-1011

    Article  PubMed  Google Scholar 

  • Caldwell JN, Engelen L, van der Henst C, Taylor NAS (2005) The thermal consequences of wearing body armour during extended exercise in the heat. UOW-HPL-Report-021. Human Performance Laboratories, University of Wollongong. For: Defence Science and Technology Organisation, Department of Defence, Melbourne, Australia, pp 1–23

  • Caldwell JN, Taylor NAS (2007) Bench-top evaluation of heat penetration through equestrian helmets. UOW-HPL-Report-026. Human Performance Laboratories, University of Wollongong. For: Meat and Livestock Australia (Sydney, Australia) and the Cooperative Research Centre for Australian Weed Management (Australia), pp 1–21

  • Caldwell JN, van den Heuvel AMJ, Taylor NAS (2007) Laboratory-based physiological assessment of the thermal strain associated with wearing horse-riding helmets. UOW-HPL-Report-029. Human Performance Laboratories, University of Wollongong. For: Meat and Livestock Australia (Sydney, Australia) and the Cooperative Research Centre for Australian Weed Management (Australia), pp 1–42

  • Clark RP, Toy N (1975) Natural convection around the human head. J Physiol 244:283-293

    PubMed  CAS  Google Scholar 

  • Ellis AJ, Bertolini AF, Thompson LA (2000) A review of research on bicycle helmet ventilation. Sports Eng 3:185–194

    Article  Google Scholar 

  • Fogarty AL, Armstrong KA, Gordon CJ, Groeller H, Woods BF, Taylor NAS (2005) Physiological consequences of wearing personal protective equipment: clothing and helmets. In: Tochihara Y, Ohnaka T (eds) Environmental ergonomics: the ergonomics of human comfort, health and performance in the thermal environment. Elsevier, pp 383–388

  • Froese G, Burton AC (1957) Heat losses from the human head. J Appl Physiol 10(2):235–241

    PubMed  CAS  Google Scholar 

  • Gant N, Atkinson G, Williams C (2006) The validity and reliability of intestinal temperature during intermittent running. Med Sci Sports Exerc 38(11):1926–1931

    Article  PubMed  Google Scholar 

  • Gisolfi CV, Rohlf DP, Navarude SN, Hayes CL, Sayeed SA (1988) Effects of wearing a helmet on thermal balance while cycling in the heat. Phys Sportsmed 16:139–146

    Google Scholar 

  • Gopinathan PM, Pichan G, Sharma MA (1988) Role of dehydration in heat stress-induced variations in mental performance. Arch Environ Health 43:15–17

    Article  PubMed  CAS  Google Scholar 

  • Hancock PA, Vasmatzidis I (2003) Effects of heat stress on cognitive performance: the current state of knowledge. Int J Hyperthermia 19(3):355–372

    Article  PubMed  CAS  Google Scholar 

  • Hardy JD, DuBois EF (1938) The technic of measuring radiation and convection. J Nutr 15:461–475

    CAS  Google Scholar 

  • Holland EJ, Laing RM, Lemmon TL, Niven BE (2002) Helmet design to facilitate thermoneutrality during forest harvesting. Ergonomics 45:699-716

    Article  PubMed  CAS  Google Scholar 

  • ISO 9886 (1992) Evaluation of thermal strain by physiological measurements. International Standard Organisation, Geneva

    Google Scholar 

  • John D, Dawson B (1989) The effects of wearing two different cycling helmets on thermoregulatory responses to prolonged submaximal exercise in hot, dry conditions. J Hum Mov Stud 16:203–214

    Google Scholar 

  • Liu X, Holmer I (1995) Evaporative heat transfer characteristics of industrial helmets. Appl Ergon 26:135–140

    Article  PubMed  CAS  Google Scholar 

  • McKenzie JE, Osgood DW (2004) Validation of a new telemetric core temperature monitor. J Therm Biol 29:605–611

    Article  Google Scholar 

  • Neave N, Emmett J, Moss M, Ayton R, Scholey A, Wesnes K (2004) The effects of protective helmet use on physiology and cognition in young cricketers. Appl Cogn Psychol 18:1181–1193

    Article  Google Scholar 

  • Nunneley SA (1989) Heat stress in protective clothing. Interactions among physical and physiological factors. Scand J Work Environ Health 15:52–57

    PubMed  Google Scholar 

  • Nunneley SA, Reader DC, Maldonado RJ (1982) Head-temperature effects on physiology, comfort, and performance during hyperthermia. Aviat Space Environ Med 53:623-628

    PubMed  CAS  Google Scholar 

  • Patel R, Mohan D (1993) An improved motorcycle helmet design for tropical climates. Appl Ergon 24:427–431

    Article  PubMed  CAS  Google Scholar 

  • Rasch W, Samson P, Cote J, Cabanac M (1991) Heat loss from the human head during exercise. J Appl Physiol 71:590–595

    PubMed  CAS  Google Scholar 

  • Reischl U (1986) Fire fighter helmet ventilation analysis. Am Ind Hyg Assoc J 47(9):546-551

    PubMed  CAS  Google Scholar 

  • Sheffield-Moore M, Short KR, Kerr CG, Parcell AC, Bolster DR, Costill DL (1997) Thermoregulatory responses to cycling with and without a helmet. Med Sci Sports Exerc 29(6):755–761

    PubMed  CAS  Google Scholar 

  • Shephard JM, Kosslyn SM (2005) The MiniCog rapid assessment battery: developing a “blood pressure cuff for the mind”. Aviat Space Environ Med 76(6 suppl):B192–B197

    PubMed  Google Scholar 

  • Szinnai G, Schachnger H, Arnaud MJ, Linder L, Keller U (2005) Effect of water deprivation on cognitive-motor performance in healthy men and women. Am J Physiol 289:R275–R280

    CAS  Google Scholar 

  • Taylor NAS, Caldwell JN (2007) Physiological demands of horseback mustering in northern Australia. UOW-HPL-Report-024. Human Performance Laboratories, University of Wollongong. For: Meat and Livestock Australia (Sydney, Australia) and the Cooperative Research Centre for Australian Weed Management (Australia), pp 1–84

  • TBMED507 (2003) Heat stress control and heat casualty management. Technical Bulletin Medical 507. Air Force Pamphlet 48–152 (I). Department of the Army and Air Force. Washington DC, USA. http://www.usariem.army.mil/download/tbmed507.pdf

  • Vital JM, Senegas J (1986) Anatomical bases of the study of the constraints to which the cervical spine is subject in the sagittal plane. A study of the center of gravity of the head. Surg Radiol Anat 8(3):169-173

    Article  PubMed  CAS  Google Scholar 

  • World Health Organisation (1969) Health factors involved in working conditions of heat stress. WHO Technical Report. Series Number 412. Geneva

  • Zenker W, Kubik S (1996) Brain cooling in humans––anatomical considerations. Anat Embryol (Berl) 193(1):1-13

    CAS  Google Scholar 

Download references

Acknowledgments

This project was fully funded by Meat and Livestock Australia and the Cooperative Research Centre for Australian Weed Management (Australia).

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Authors and Affiliations

  1. Human Performance Laboratories, School of Health Sciences, University of Wollongong, Wollongong, NSW, 2522, Australia

    Nigel A. S. Taylor & Joanne N. Caldwell

  2. Meat and Livestock Australia, Livestock Production Innovation, Newstead, QLD, 4006, Australia

    Rodd Dyer

Authors
  1. Nigel A. S. Taylor
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  2. Joanne N. Caldwell
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  3. Rodd Dyer
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Correspondence to Nigel A. S. Taylor.

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Taylor, N.A.S., Caldwell, J.N. & Dyer, R. The physiological demands of horseback mustering when wearing an equestrian helmet. Eur J Appl Physiol 104, 289–296 (2008). https://doi.org/10.1007/s00421-007-0659-5

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