Abstract
Thermoregulation is impaired in individuals with a spinal cord lesion (SCI),
affecting sweat capacity, heat loss, and core temperature. This can be
particularly problematic for athletes with SCI who exercise in hot and humid
conditions, like those during the Tokyo 2020 Paralympic Games. Heat acclimation
can support optimal preparation for exercise in such challenging environments,
but evidence is limited in endurance athletes with SCI. We evaluated whether
seven consecutive days of exercise in the heat would result in heat acclimation.
Five elite para-cycling athletes with SCI participated (two females, three
males, median (Q1-Q3) 35 (31–51) years, four with paraplegia and one with
tetraplegia). All tests and training sessions were performed in a heat chamber
(30°C and 75% relative humidity). A time-to-exhaustion test was performed on day
1 (pretest) and day 7 (posttest). On days 2–6, athletes trained daily for one
hour at 50–60% of individual peak power (PPeak). Comparing pretest
and posttest, all athletes increased their body mass loss (p=0.04), sweat rate
(p=0.04), and time to exhaustion (p=0.04). Effects varied between athletes for
core temperature and heart rate. All athletes appeared to benefit from our heat
acclimation protocol, helping to optimize their preparation for the Tokyo 2020
Paralympic Games.
Keywords
heat chamber - endurance performance - thermoregulation - Paralympics - paraplegia - tetraplegia - para-athletes
