Skip to main content

Advertisement

Log in

Managing Collapsed or Seriously Ill Participants of Ultra-Endurance Events in Remote Environments

  • Review Article
  • Published:
Sports Medicine Aims and scope Submit manuscript

Abstract

Increasing participation in ultramarathons and other ultra-endurance events amplifies the potential for serious medical issues during and immediately following these competitions. Since these events are often located in remote settings where access may be extremely limited; the diagnostic capabilities, treatment options, and expectations of medical care may differ from those of urban events. This work outlines a process for assessment and treatment of athletes presenting for medical attention in remote environments, with a focus on potentially serious conditions such as major trauma, acute coronary syndrome, exertional heat stroke, hypothermia, hypoglycemia, exercise-associated hyponatremic encephalopathy, severe dehydration, altitude illness, envenomation, anaphylaxis, and bronchospasm. A list of suggested medical supplies is provided and discussed. But, given that diagnostic and treatment options may be extremely limited in remote settings, it is important for medical providers to understand how to assess and manage the most common serious medical issues with limited resources, and to be prepared to make presumptive diagnoses when necessary.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1

Similar content being viewed by others

References

  1. Cejka N, Rüst CA, Lepers R, et al. Participation and performance trends in 100-km ultra-marathons worldwide. J Sports Sci. 2014;32:354–66.

    Article  PubMed  Google Scholar 

  2. Hoffman MD, Ong JC, Wang G. Historical analysis of participation in 161 km ultramarathons in North America. Int J Hist Sport. 2010;27:1877–91.

    Article  PubMed  Google Scholar 

  3. Ultrarunning—the year in review. Ultrarunning. 2014:30–47.

  4. Bishop GW, Fallon KE. Musculoskeletal injuries in a 6-day track race: ultramarathoner’s ankle. Clin J Sport Med. 1999;9:216–20.

    Article  CAS  PubMed  Google Scholar 

  5. Fallon KE. Musculoskeletal injuries in the ultramarathon: the 1990 Westfield Sydney to Melbourne run. Br J Sports Med. 1996;30:319–23.

    Article  CAS  PubMed Central  PubMed  Google Scholar 

  6. Graham SM, McKinley M, Chris CC, et al. Injury occurrence and mood states during a desert ultramarathon. Clin J Sports Med. 2012;0:1–5.

    Google Scholar 

  7. Hoffman MD, Pasternak A, Rogers IR, et al. Consensus guidelines for medical services at ultra-endurance foot races in remote environments. Sports Med. 2014;44:1055–69.

    Article  PubMed  Google Scholar 

  8. Holtzhausen LM, Noakes TD. Collapsed ultraendurance athlete: proposed mechanisms and an approach to management. Clin J Sport Med. 1997;7:292–301.

    Article  CAS  PubMed  Google Scholar 

  9. Khodaee M, Ansari M. Common ultramarathon injuries and illnesses: race day management. Curr Sports Med Rep. 2012;11:290–7.

    Article  PubMed  Google Scholar 

  10. Krabak BJ, Waite B, Schiff MA. Study of injury and illness rates in multiday ultramarathon runners. Med Sci Sports Exerc. 2011;43:2314–20.

    Article  PubMed  Google Scholar 

  11. Laird RH. Medical care at ultraendurance triathlons. Med Sci Sports Exerc. 1989;21(5 Suppl):S222–5.

    Article  CAS  PubMed  Google Scholar 

  12. McGowan V, Hoffman MD. Characterization of medical care at the 161-km Western States Endurance Run. Wildernes Environ Med. 2014. doi:10.1016/j.wem.2014.06.015 [Epub ahead of print].

  13. McLaughlin KA, Townes DA, Wedmore IS, et al. Pattern of injury and illness during expedition-length adventure races. Wilderness Environ Med. 2006;17:158–61.

    Article  PubMed  Google Scholar 

  14. Reid SA, King MJ. Serum biochemistry and morbidity among runners presenting for medical care after an Australian mountain ultramarathon. Clin J Sport Med. 2007;17:307–10.

    Article  PubMed  Google Scholar 

  15. Scheer BV, Murray A. Al Andalus ultra trail: an observation of medical interventions during a 219-km, 5-day ultramarathon stage race. Clin J Sport Med. 2011;21:444–6.

    Article  PubMed  Google Scholar 

  16. Schwabe K, Schwellnus M, Derman W, et al. Medical complications and deaths in 21 and 56 km road race runners: a 4-year prospective study in 65,865 runners—SAFER study I. Br J Sports Med. 2014;48(11):912–8.

    Article  PubMed  Google Scholar 

  17. Speedy DB, Rogers IR, Noakes TD, et al. Diagnosis and prevention of hyponatremia at an ultradistance triathlon. Clin J Sport Med. 2000;10:52–8.

    Article  CAS  PubMed  Google Scholar 

  18. Townes DA, Talbot TS, Wedmore IS, et al. Event medicine: injury and illness during an expedition-length adventure race. J Emerg Med. 2004;27:161–5.

    Article  PubMed  Google Scholar 

  19. Asplund CA, O’Connor FG, Noakes TD. Exercise-associated collapse: an evidence-based review and primer for clinicians. Br J Sports Med. 2011;45:1157–62.

    Article  PubMed  Google Scholar 

  20. Brennan FH, O’Connor FG. Emergency triage of collapsed endurance athletes: a stepwise approach to on-site treatment. Phys Sportsmed. 2005;33:28–35.

    Article  PubMed  Google Scholar 

  21. Childress MA, O’Connor FG, Levine BD. Exertional collapse in the runner: evaluation and management in fieldside and office-based settings. Clin Sports Med. 2010;29:459–76.

    Article  PubMed  Google Scholar 

  22. Lento PH, Sullivan WJ. The downed runner. Phys Med Rehabil Clin N Am. 2005;16:831–49.

    Article  PubMed  Google Scholar 

  23. Roberts WO. Exercise-associated collapse care matrix in the marathon. Sports Med. 2007;37:431–3.

    Article  PubMed  Google Scholar 

  24. Speedy DB, Noakes TD, Holtzhausen LM. Exercise-associated collapse: postural hypotension, or something deadlier? Phys Sportsmed. 2003;31:23–9.

    PubMed  Google Scholar 

  25. Bennett BL, Hew-Butler T, Hoffman MD, et al. Wilderness Medical Society practice guidelines for treatment of exercise-associated hyponatremia. Wilderness Environ Med. 2013;24:228–40.

    Article  PubMed  Google Scholar 

  26. Burdick TE. Wilderness event medicine: planning for mass gatherings in remote areas. Travel Med Infect Dis. 2005;3:249–58.

    Article  PubMed  Google Scholar 

  27. Paal P, Milani M, Brown D, et al. Termination of cardiopulmonary resuscitation in mountain rescue. High Alt Med Biol. 2012;13:200–8.

    Article  PubMed  Google Scholar 

  28. Wright JM, Islas AA. Concussion management in the wilderness. Wilderness Environ Med. 2014;25:319–24.

  29. Dunn L. Raised intracranial pressure. J Neurol Neurosurg Psychiatry. 2002;73(Suppl 1):i23–7.

    PubMed Central  PubMed  Google Scholar 

  30. Quinn R, Williams J, Bennett B, et al. Wilderness Medical Society practice guidelines for spine immobilization in the austere environment. Wilderness Environ Med. 2013;24:241–52.

    Article  PubMed  Google Scholar 

  31. Roberts WO. A 12-year profile of medical injury and illness for the Twin Cities Marathon. Med Sci Sports Exerc. 2000;32:1549–55.

    Article  CAS  PubMed  Google Scholar 

  32. Roberts WO. Exercise-associated collapse in endurance events: a classification system. Phys Sportsmed. 1989;17:49–55.

    Google Scholar 

  33. Holtzhausen LM, Noakes TD. The prevalence and significance of post-exercise (postural) hypotension in ultramarathon runners. Med Sci Sports Exerc. 1995;27:1595–601.

    Article  CAS  PubMed  Google Scholar 

  34. Holtzhausen LM, Noakes TD, Kroning B, et al. Clinical and biochemical characteristics of collapsed ultra-marathon runners. Med Sci Sports Exerc. 1994;26:1095–101.

    Article  CAS  PubMed  Google Scholar 

  35. Hastings JL, Levine BD. Syncope in the athletic patient. Prog Cardiovasc Dis. 2001;54:438–44.

    Article  Google Scholar 

  36. ISIS-2 Collaborative Group. Randomised trial of intravenous streptokinase, oral aspirin, both, or neither among 17,187 cases of suspected acute myocardial infarction: ISIS-2. Lancet. 1988;332:349–60.

    Article  Google Scholar 

  37. Blomström-Lundqvist C, Scheinman MM, Aliot EM, et al. ACC/AHA/ESC guidelines for the management of patients with supraventricular arrhythmias—executive summary. A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Develop Guidelines for the Management of Patients with Supraventricular Arrhythmias) developed in collaboration with NASPE-Heart Rhythm Society. J Am Coll Cardiol. 2003;42:1493–531.

    Article  PubMed  Google Scholar 

  38. Smith G, Morgans A, Boyle M. Use of the Valsalva manoeuvre in the prehospital setting: a review of the literature. Emerg Med J. 2009;26:8–10.

    Article  CAS  PubMed  Google Scholar 

  39. Shapiro SY, Seidman DS. Field and clinical observations of exertional heat stroke patients. Med Sci Sport Exerc. 1990;22:6–14.

    Article  CAS  Google Scholar 

  40. Vicario SJ, Okabajue R, Haltom T. Rapid cooling in classic heatstroke: effect on mortality rates. Am J Emerg Med. 1986;4:394–8.

    Article  CAS  PubMed  Google Scholar 

  41. Smith JE. Cooling methods used in the treatment of exertional heat illness. Br J Sports Med. 2005;39:503–7.

    Article  CAS  PubMed Central  PubMed  Google Scholar 

  42. Casa DJ, McDermott BP, Lee EC, et al. Cold water immersion: the gold standard for exertional heatstroke treatment. Exerc Sport Sci Rev. 2007;35:141–9.

    Article  PubMed  Google Scholar 

  43. Lipman GS, Eifling KP, Ellis MA, et al. Wilderness Medical Society practice guidelines for the prevention and treatment of heat-related illness. Wilderness Environ Med. 2013;24:351–61.

    Article  PubMed  Google Scholar 

  44. Brown DJA, Brugger H, Boyd J, et al. Accidental hypothermia. N Engl J Med. 2012;367:1930–8.

    Article  CAS  PubMed  Google Scholar 

  45. Giesbrecht GG. Emergency treatment of hypothermia. Emerg Med (Australas). 2001;13:9–16.

    Article  CAS  Google Scholar 

  46. Grueskin J, Tanen DA, Harvey P, et al. A pilot study of mechanical stimulation and cardiac dysrhythmias in a porcine model of induced hypothermia. Wilderness Environ Med. 2007;18:133–7.

    Article  PubMed  Google Scholar 

  47. Lumb AN, Gallen IW. Diabetes management for intense exercise. Curr Opin Endocrinol Diabetes Obes. 2009;16:150–5.

    Article  PubMed  Google Scholar 

  48. Graveling AJ, Frier BM. Risks of marathon running and hypoglycaemia in type 1 diabetes. Diabet Med. 2010;27:585–8.

    Article  CAS  PubMed  Google Scholar 

  49. Baska RS, Moses FM, Graeber G, et al. Gastrointestinal bleeding during an ultramarathon. Dig Dis Sci. 1990;35:276–9.

    Article  CAS  PubMed  Google Scholar 

  50. Glace B, Murphy C, McHugh M. Food and fluid intake and disturbances in gastrointestinal and mental function during an ultramarathon. Int J Sport Nutr Exerc Metab. 2002;12:414–27.

    PubMed  Google Scholar 

  51. Glace BW, Murphy CA, McHugh MP. Food intake and electrolyte status of ultramarathoners competing in extreme heat. J Am Coll Nutr. 2002;21(6):553–9.

    Article  PubMed  Google Scholar 

  52. Hoffman MD, Fogard K. Factors related to successful completion of a 161-km ultramarathon. Int J Sports Physiol Perform. 2011;6:25–37.

    PubMed  Google Scholar 

  53. Stuempfle KJ, Hoffman MD, Hew-Butler T. Association of gastrointestinal distress in ultramarathoners with race diet. Int J Sport Nutr Exerc Metabol. 2013;23:103–9.

    CAS  Google Scholar 

  54. Attvall S, Lager I, Smith U. Rectal glucose administration cannot be used to treat hypoglycemia. Diabetes Care. 1985;8:412–3.

    Article  CAS  PubMed  Google Scholar 

  55. Vukmir RB, Paris PM, Yealy DM. Glucagon: prehospital therapy for hypoglycemia. Ann Emerg Med. 1991;20:375–9.

    Article  CAS  PubMed  Google Scholar 

  56. Hew-Butler T, Ayus JC, Kipps C, et al. Statement of the Second International Exercise-Associated Hyponatremia Consensus Development Conference, New Zealand, 2007. Clin J Sport Med. 2008;18:111–21.

    Article  PubMed  Google Scholar 

  57. Bennett BL, Hew-Butler T, Hoffman MD, et al. In reply to clinical practice guidelines for treatment of exercise-associated hyponatremia. Wilderness Environ Med. 2013;24:468–71.

    Article  PubMed  Google Scholar 

  58. Ayus JC, Varon J, Arieff AI. Hyponatremia, cerebral edema, and noncardiogenic pulmonary edema in marathon runners. Ann Intern Med. 2000;132:711–4.

    Article  CAS  PubMed  Google Scholar 

  59. Frizzell RT, Lang GH, Lowance DC, et al. Hyponatremia and ultramarathon running. JAMA. 1986;255:772–4.

    Article  CAS  PubMed  Google Scholar 

  60. Hoffman MD, Stuempfle KJ, Sullivan K, et al. Exericise-associated hyponatremia with exertional rhabdomyolysis: importance of proper treatment. Clin Nephrol. 2014. [Epub ahead of print].

  61. Siegel AJ, d’Hemecourt P, Adner MM, et al. Exertional dysnatremia in collapsed marathon runners: a critical role for point-of-care testing to guide appropriate therapy. Am J Clin Path. 2009;132(3):336–40.

    Article  PubMed  Google Scholar 

  62. Elsaesser TF, Pang PS, Malik S, et al. Large-volume hypertonic saline therapy in endurance athlete with exercise-associated hyponatremic encephalopathy. J Emerg Med. 2013;44:1132–5.

    Article  PubMed  Google Scholar 

  63. Hoffman MD, Hew-Butler T, Schwellnus M. Regarding the Wilderness Medical Society practice guidelines for heat-related illness. Wilderness Environ Med. 2014;25(2):246–7.

    Article  PubMed  Google Scholar 

  64. Hoffman MD, Weiss RH. Symptomatic hypotonic hyponatremia presenting at high altitude. Wilderness Environ Med. 2014. [Epub ahead of print].

  65. Noakes TD. Hyponatremia in distance athletes: pulling the IV on the ‘dehydration myth’. Phys Sportsmed. 2000;28:71–6.

    Article  CAS  PubMed  Google Scholar 

  66. Pyne S. Intravenousfluids post marathon: when and why? Sports Med. 2007;37:434–6.

    Article  PubMed  Google Scholar 

  67. Hoffman MD, Hew-Butler T, Stuempfle KJ. Exercise-associated hyponatremia and hydration status in 161-km ultramarathoners. Med Sci Sports Exerc. 2013;45:784–91.

    Article  PubMed  Google Scholar 

  68. Noakes TD, Sharwood K, Speedy D, et al. Three independent biological mechanisms cause exercise-associated hyponatremia: evidence from 2,135 weighed competitive athletic performances. Proc Natl Acad Sci. 2005;102:18550–5.

    Article  CAS  PubMed Central  PubMed  Google Scholar 

  69. McGarvey J, Thompson J, Hanna C, et al. Sensitivity and specificity of clinical signs for assessment of dehydration in endurance athletes. Br J Sports Med. 2010;44:716–9.

    Article  CAS  PubMed  Google Scholar 

  70. Luks AM, McIntosh SE, Grissom CK, et al. Wilderness Medical Society consensus guidelines for the prevention and treatment of acute altitude illness. Wilderness Environ Med. 2010;21:146–55.

    Article  PubMed  Google Scholar 

  71. Talbot TS, Townes DA, Wedmore IS. To air is human: altitude illness during an expedition length adventure race. Wilderness Environ Med. 2004;15:90–4.

    Article  PubMed  Google Scholar 

  72. Eide RP 3rd, Asplund CA. Altitude illness: update on prevention and treatment. Curr Sports Med Rep. 2012;11:124–30.

    Article  PubMed  Google Scholar 

  73. Maggiorini M. High altitude-induced pulmonary oedema. Cardiovasc Res. 2006;72:41–50.

    Article  CAS  PubMed  Google Scholar 

  74. Boyd JJ, Agazzi G, Svajda D, et al. Venomous snakebite in mountainous terrain: prevention and management. Wilderness Environ Med. 2007;18:190–202.

    Article  PubMed  Google Scholar 

  75. Lavonas EJ, Ruha AM, Banner W, et al. Unified treatment algorithm for the management of crotaline snakebite in the United States: results of an evidence-informed consensus workshop. BMC Emerg Med. 2011;3(11):2. doi:10.1186/1471-227X-11-2.

    Article  Google Scholar 

  76. Quan D. North American poisonous bites and stings. Crit Care Clin. 2012;28:633–59.

    Article  PubMed  Google Scholar 

  77. Bush SP, Green SM, Laack TA, et al. Pressure immobilization delays mortality and increases intracompartmental pressure after artificial intramuscular rattlesnake envenomation in a porcine model. Ann Emerg Med. 2004;44:599–604.

    Article  PubMed  Google Scholar 

  78. Seifert S, White J, Currie BJ. Pressure bandaging for North American snake bite? No! Clin Toxicol (Phila). 2011;49:883–5.

    Article  PubMed  Google Scholar 

Download references

Acknowledgments

The authors (MDH, IRR, JJ, CAA, WOR, and BDL) have no potential conflicts of interest that are directly relevant to the content of this article, but acknowledge being Director of Research for the Western States Endurance Run and Chief Medical Officer for Ultra Medical Team (MDH); Medical Director of Ironman Syracuse, Empire State Marathon, Desert R.A.T.S., Grand to Grand Ultra, and Global Limits, Inc., and Clinical Medical Director of Jungle Marathon (JJ); and Medical Director of the Twin Cities in Motion and the Medtronic Twin Cities Marathon (WOR). No funding was received for the conduct of the work or for preparation of the manuscript. This material is the result of work supported with resources and the use of facilities at the VA Northern California Health Care System. The contents reported here do not represent the views of the Department of Veterans Affairs or the United States Government.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Martin D. Hoffman.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Hoffman, M.D., Rogers, I.R., Joslin, J. et al. Managing Collapsed or Seriously Ill Participants of Ultra-Endurance Events in Remote Environments. Sports Med 45, 201–212 (2015). https://doi.org/10.1007/s40279-014-0270-y

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s40279-014-0270-y

Keywords

Navigation