Extended post-exercise hyperthermia in athletes with a spinal cord injury

Area of Science:

• Exercise Physiology
• Sports Medicine
• Thermoregulation Research

Background:

• Athletes with spinal cord injury (SCI) face unique thermoregulatory challenges during and after exercise.
• Understanding post-exercise hyperthermia is crucial for athlete safety and performance optimization.

Purpose of the Study:

• To investigate the extent and causes of elevated body temperature in athletes with SCI after exercise.
• To compare thermoregulatory responses between individuals with tetraplegia (TP), high paraplegia (HP), low paraplegia (LP), and able-bodied (AB) individuals.

Main Methods:

• An observational study involving 31 male participants (8 TP, 7 HP, 8 LP, 8 AB).
• Participants underwent 30 minutes of exercise followed by 45 minutes of recovery in a controlled hot environment (35°C/50%RH).
• Core (esophageal, gastrointestinal) and skin temperatures, metabolic heat production, and local sweat rate were measured.

Main Results:

• Tetraplegia athletes exhibited significant post-exercise hyperthermia, with core temperatures approximately 1.4°C higher than able-bodied individuals.
• Impaired evaporative heat loss (near zero) was identified as the primary cause in TP.
• High paraplegia athletes demonstrated delayed thermoregulatory recovery, while low paraplegia athletes responded similarly to able-bodied individuals.

Conclusions:

• Tetraplegia significantly compromises post-exercise heat dissipation, leading to substantial hyperthermia.
• Thermoregulatory recovery patterns differ across SCI levels, with HP showing delayed responses and LP showing responses similar to AB.
• These findings highlight the need for tailored exercise and recovery strategies for athletes with SCI.