Partial heat acclimation of athletes with spinal cord lesion

Paul C. Castle, B. Pasan Kularatne, John Brewer, Alexis R. Mauger, Ross A. Austen, James A. Tuttle, Nicholas Sculthorpe, Richard W. Mackenzie, Neil S. Maxwell, Anthony D.J. Webborn

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Heat acclimation (HA) can improve thermoregulatory stability in able-bodied athletes in part by an enhanced sweat response. Athletes with spinal cord lesion are unable to sweat below the lesion and it is unknown if they can HA. Five paralympic shooting athletes with spinal cord lesion completed seven consecutive days HA in hot conditions (33.4 +/- A 0.6 A degrees C, 64.8 +/- A 3.7 %rh). Each HA session consisted of 20 min arm crank exercise at 50 % followed by 40 min rest, or simulated shooting. Aural temperature (T (aur)) was recorded throughout. Body mass was assessed before and after each session and a sweat collection swab was fixed to T12 of the spine. Fingertip whole blood was sampled at rest on days 1 and 7 for estimation of the change in plasma volume. Resting T (aur) declined from 36.3 +/- A 0.2 A degrees C on day 1 to 36.0 +/- A 0.2 A degrees C by day 6 (P < 0.05). During the HA sessions mean, T (aur) declined from 37.2 +/- A 0.2 A degrees C on day 1, to 36.7 +/- A 0.3 A degrees C on day 7 (P < 0.05). Plasma volume increased from day 1 by 1.5 +/- A 0.6 % on day 7 (P < 0.05). No sweat secretion was detected or changes in body mass observed from any participant. Repeated hyperthermia combined with limited evaporative heat loss was sufficient to increase plasma volume, probably by alterations in fluid regulatory hormones. In conclusion, we found that although no sweat response was observed, athletes with spinal cord lesion could partially HA.
Original languageEnglish
Pages (from-to)109-115
Number of pages7
JournalEuropean Journal of Applied Physiology
Volume113
Issue number1
DOIs
Publication statusPublished - Jan 2013
Externally publishedYes

Keywords

  • Spinal cord injury
  • Disability
  • Thermoregulation
  • Acclimatisation
  • Hyperthermia

Cite this

Castle, P. C., Kularatne, B. P., Brewer, J., Mauger, A. R., Austen, R. A., Tuttle, J. A., ... Webborn, A. D. J. (2013). Partial heat acclimation of athletes with spinal cord lesion. European Journal of Applied Physiology, 113(1), 109-115. https://doi.org/10.1007/s00421-012-2417-6