title: Partial heat acclimation of athletes with spinal cord lesion.
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 ± 0.6 °C, 64.8 ± 3.7 %rh). Each HA session consisted of 20 min arm crank exercise at 50 % [Formula: see text] 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 ± 0.2 °C on day 1 to 36.0 ± 0.2 °C by day 6 (P < 0.05). During the HA sessions mean, T (aur) declined from 37.2 ± 0.2 °C on day 1, to 36.7 ± 0.3 °C on day 7 (P < 0.05). Plasma volume increased from day 1 by 1.5 ± 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.
authors.affiliation: ISPAR, Department of Sport and Exercise Science, University of Bedfordshire, Polhill Avenue, Bedford MK41 9EA, UK. castlephd@gmail.com
authors.forename: Paul C
authors.initials: PC
authors.lastname: Castle
authors.forename: B Pasan
authors.initials: BP
authors.lastname: Kularatne
authors.forename: John
authors.initials: J
authors.lastname: Brewer
authors.forename: Alexis R
authors.initials: AR
authors.lastname: Mauger
authors.forename: Ross A
authors.initials: RA
authors.lastname: Austen
authors.forename: James A
authors.initials: JA
authors.lastname: Tuttle
authors.forename: Nick
authors.initials: N
authors.lastname: Sculthorpe
authors.forename: Richard W
authors.initials: RW
authors.lastname: Mackenzie
authors.forename: Neil S
authors.initials: NS
authors.lastname: Maxwell
authors.forename: Anthony D J
authors.initials: AD
authors.lastname: Webborn
mesh_terms: D000064:Acclimatization; D000328:Adult; D001833:Body Temperature Regulation; D015444:Exercise; D006358:Hot Temperature; D006801:Humans; D013119:Spinal Cord Injuries / Q000503:physiopathology*; D013177:Sports