Do older firefighters show long-term adaptations to work in the heat?

Journal of Occupational and Environmental Hygiene

Volumn 10, Issue 12, 2013, Pages 705-715

  Wright, Heather E ^a   Larose, Joanie ^a   McLellan, Tom M ^b   Miller, Scott ^c   Boulay, Pierre ^d   Kenny, Glen P ^a  

^a UNIVERSITY OF OTTAWA   (Canada)

^b TM McLellan Research Inc   (Canada)

^c Ottawa Fire Services   (Canada)

^d UNIVERSITÉ DE SHERBROOKE   (Canada)

Author keywords

core temperature; dry and humid heat; perceptual strain; physiological strain; repeated heat stress

Indexed keywords

ADAPTATION; ARTICLE; BLOOD VOLUME; BODY TEMPERATURE; FIRE FIGHTER; HEART RATE; HEAT; HEAT SHOCK RESPONSE; HUMAN; MIDDLE AGED; OCCUPATIONAL EXPOSURE;

ADAPTATION, PHYSIOLOGICAL; BLOOD VOLUME; BODY TEMPERATURE; FIREFIGHTERS; HEART RATE; HEAT-SHOCK RESPONSE; HOT TEMPERATURE; HUMANS; MIDDLE AGED; OCCUPATIONAL EXPOSURE;

EID: 84891374580     PISSN: 15459624     EISSN: 15459632     Source Type: Journal    
DOI: 10.1080/15459624.2013.821574     Document Type: Article

References (46)

1. Sawka, M.N., A.J. Young, R.P. Francesconi, S.R. Muza, and K.B. Pandolf: Thermoregulatory and blood responses during exercise at graded hypohydration levels. J. Appl. Physiol. 59(5):1394-1401 (1985).
2. Candas,V., J.P.Libert,G.Brandenberger, J.C. Sagot, and J.M. Kahn: Thermal and circulatory responses during prolonged exercise at different levels of hydration. J. Physiol. (Paris) 83(1):11-18 (1988).
3. Gonzalez-Alonso, J., R. Mora-Rodriguez, P.R. Below, and E.F. Coyle: Dehydration reduces cardiac output and increases systemic and cutaneous vascular resistance during exercise. J. Appl. Physiol. 79(5):1487-1496 (1995).
4. Montain, S.J., and E.F. Coyle: Influence of graded dehydration on hyperthermia and cardiovascular drift during exercise. J. Appl. Physiol. 73(4):1340-1350 (1992).
5. Shirreffs, S.M., S.J.Merson, S.M. Fraser, andD.T.Archer: The effects of fluid restriction on hydration status and subjective feelings in man. Br. J. Nutr. 91(6):951-958 (2004).
6. Ganio, M.S., L.E. Armstrong, D.J. Casa, et al.: Mild dehydration impairs cognitive performance and mood of men. Br. J. Nutr. 106(10):1535-1543 (2011).
7. Adan, A.: Cognitive performance and dehydration. J. Am. Coll. Nutr. 31(2):71-78 (2012).
8. Petruzzello, S.J., J.I. Gapin, E. Snook, and D.L. Smith: Perceptual and physiological heat strain: Examination in firefighters in laboratory-and field-based studies. Ergonomics 52(6):747-754 (2009).
9. Horn, G.P., J. DeBlois, I. Shalmyeva, and D.L. Smith: Quantifying dehydration in the fire service using field methods and novel devices. Prehosp. Emerg. Care 16(3):347-355 (2012).
10. Rodriguez-Marroyo, J.A., J. Lopez-Satue, R. Pernia, et al.: Physiological work demands of Spanish wildland firefighters during wildfire suppression. Int. Arch. Occup. Environ. Health 85(2):221-228 (2012).
11. Smith, D.L., and S.J. Petruzzello: Selected physiological and psychological responses to live-fire drills in different configurations of firefighting gear. Ergonomics 41(8):1141-1154 (1998).
12. Smith, D.L., S.J. Petruzzello, M.A. Chludzinski, J.J. Reed, and J.A. Woods: Selected hormonal and immunological responses to strenuous live-fire firefighting drills. Ergonomics 48(1):55-65 (2005).
13. Selkirk, G.A., T.M. McLellan, and J. Wong: The impact of various rehydration volumes for firefighters wearing protective clothing in warm environments. Ergonomics 49(4):418-433 (2006).
14. Romet, T.T., and J. Frim: Physiological responses to fire fighting activities. Eur. J. Appl. Physiol. Occup. Physiol. 56(6):633-638 (1987).
15. McLellan, T.M., and G.A. Selkirk: The management of heat stress for the firefighter: A review of work conducted on behalf of the Toronto Fire Service. Ind. Health 44(3):414-426 (2006).
16. Kenny, G.P., M. Vierula, J. Mate, F. Beaulieu, S.G. Hardcastle, and F. Reardon: A field evaluation of the physiological demands of miners in Canada's deep mechanized mines. J. Occup. Environ. Hyg. 9(8):491-501 (2012).
17. Aoyagi, Y., T.M. McLellan, and R.J. Shephard: Effects of training and acclimation on heat tolerance in exercising men wearing protective clothing. Eur. J. Appl. Physiol. Occup. Physiol. 68(3):234-245 (1994).
18. McLellan, T.M., and Y. Aoyagi: Heat strain in protective clothing following hot-wet or hot-dry heat acclimation. Can. J. Appl. Physiol. 21(2):90-108 (1996).
19. Candas, V., J.P. Libert, and J.J. Vogt: Influence of air velocity and heat acclimation on human skin wettedness and sweating efficiency. J. Appl. Physiol. 47(6):1194-1200 (1979).
20. Nielsen, B., J.R. Hales, S. Strange, N.J. Christensen, J. Warberg, and B. Saltin: Human circulatory and thermoregulatory adaptations with heat acclimation and exercise in a hot, dry environment. J. Physiol. 460:467-485 (1993).
21. Aoyagi,Y., T.M. McLellan, and R.J. Shephard: Interactions of physical training and heat acclimation. The thermophysiology of exercising in a hot climate. Sports Med. 23(3):173-210 (1997).
22. Pandolf, K.B.: Time course of heat acclimation and its decay. Int. J. Sports Med. 19 Suppl 2:S157-160 (1998).
23. Kampmann, B., P. Brode, M. Schutte, and B. Griefahn: Lowering of resting core temperature during acclimation is influenced by exercise stimulus. Eur. J. Appl. Physiol. 104(2):321-327 (2008).
24. Magalhaes, F.C., R.L. Passos, M.A. Fonseca, et al.: Thermoregulatory efficiency is increased after heat acclimation in tropical natives. J. Physiol. Anthropol. 29(1):1-12 (2010).
25. Moran,D.S., A. Shitzer, andK.B. Pandolf:Aphysiological strain index to evaluate heat stress. Am. J. Physiol. 275(1 Pt 2):R129-134 (1998).
26. Tikuisis, P., T.M. McLellan, and G. Selkirk: Perceptual versus physiological heat strain during exercise-heat stress. Med. Sci. Sports Exerc. 34(9):1454-1461 (2002).
27. Siri,W.E.: Gross Composition of the Body. New York, N.Y.: Academic, 1956.
28. ACGIH: Heat Stress and Strain: TLV Physical Agents Documentation. Cincinatti, Ohio: American Conference of Industrial Hygienists, 2007. pp. 1-36.
29. Nishi, Y.: Measurement of Thermal Balance in Man. In Bioengineering, Thermal Physiology and Comfort, K. Cena and J. Clark (eds.). New York, N.Y.: Elsevier, 1981. pp. 29-39.
30. Ramanathan, N.L.: A new weighting system for mean surface temperature of the human body. J. Appl. Physiol. 19(3):531-533 (1964).
31. Dill, D.B., and D.L. Costill: Calculation of percentage changes in volumes of blood, plasma, and red cells in dehydration. J. Appl. Physiol. 37(2):247-248 (1974).
32. Nadel, E.R., K.B. Pandolf, M.F. Roberts, and J.A. Stolwijk: Mechanisms of thermal acclimation to exercise and heat. J. Appl. Physiol. 37(4):515-520 (1974).
33. Havenith, G., and H. van Middendorp: The relative influence of physical fitness, acclimatization state, anthropometric measures and gender on individual reactions to heat stress. Eur. J. Appl. Physiol. Occup. Physiol. 61(5-6):419-427 (1990).
34. Roberts, M.F., C.B. Wenger, J.A. Stolwijk, and E.R. Nadel: Skin blood flow and sweating changes following exercise training and heat acclimation. J. Appl. Physiol. 43(1):133-137 (1977).
35. Armstrong, C.G., andW.L. Kenney: Effects of age and acclimation on responses to passive heat exposure. J. Appl. Physiol. 75(5):2162-2167 (1993).
36. Buono, M.J., J.H. Heaney, and K.M. Canine: Acclimation to humid heat lowers resting core temperature. Am. J. Physiol. 274(5 Pt 2):R1295-1299 (1998).
37. Cheung, S.S., and T.M. McLellan: Heat acclimation, aerobic fitness, and hydration effects on tolerance during uncompensable heat stress. J. Appl. Physiol. 84(5):1731-1739 (1998).
38. Nielsen, B.: Heat acclimation-Mechanisms of adaptation to exercise in the heat. Int. J. Sports. Med. 19 Suppl 2: S154-156 (1998).
39. Barnett, A., and R.J. Maughan: Response of unacclimatized males to repeated weekly bouts of exercise in the heat. Br. J. Sports Med. 27(1):39-44 (1993).
40. Gavhed, D.C., and I. Holmer: Thermoregulatory responses of firemen to exercise in the heat. Eur. J. Appl. Physiol. Occup. Physiol. 59(1-2):115-122 (1989).
41. Jay, O., A.R. Bain, T.M. Deren, M. Sacheli, and M.N. Cramer: Large differences in peak oxygen uptake do not independently alter changes in core temperature and sweating during exercise. Am. J. Physiol. 301(3):R832-841 (2011).
42. Shapiro, Y., D. Moran, and Y. Epstein: Acclimatization strategies-Preparing for exercise in the heat. Int. J. Sports. Med. 19 Suppl 2:S161-163 (1998).
43. Chinevere, T.D., R.W. Kenefick, S.N. Cheuvront, H.C. Lukaski, and M.N. Sawka: Effect of heat acclimation on sweat minerals. Med. Sci. Sports Exerc. 40(5):886-891 (2008).
44. Fox, R.H., R. Goldsmith, I.F. Hampton, and T.J. Hunt: Heat acclimatization by controlled hyperthermia in hot-dry and hot-wet climates. J. Appl. Physiol. 22(1):39-46 (1967).
45. Nadel, E.R.: Recent advances in temperature regulation during exercise in humans. Fed. Proc. 44(7):2286-2292 (1985).
46. Lazaar, N., C. Esbri, N. Gandon, S. Ratel, E. Dore, and P. Duche: Modalities of submaximal exercises on ratings of perceived exertion by young girls: A pilot study. Percept. Mot. Skills 99(3 Pt 2):1091-1096 (2004).