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Relationship between core temperature and skin blood flux in lower limbs during prolonged arm exercise in persons with spinal cord injury

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The purposes of the present study were to examine the response of the skin blood flux (SBF) in the paralyzed lower limbs of persons with spinal cord injury (PSCI) and to clarify the relationship between the SBF and core temperature during prolonged arm exercise. Eight male PSCI with lesions from T6 to L5 and six male control subjects (CS) participated in this study. The subjects rested for 60 min and then performed arm-cranking exercise at 20 W for 30 min at 25 °C. The tympanic membrane temperature (T ty) and SBF in the anterior thigh (SBFT) and in the posterior calf (SBFC) were continuously measured throughout the experiment. The SBFC did not change in either PSCI or CS during the experiment. The SBFT in four PSCI with high lesions (T6 to T12), remained unchanged during exercise. The SBFT in the other four PSCI with low lesions (T12 to L5, ΔSBFT+) began to elevate markedly when the T t, exceeded a threshold temperature of 36.69 °C. The pattern of increase of SBFT in ΔSBFT+ was similar to that in CS, although onset of the increase in SBFT was delayed and the peak of SBFT during exercise was significantly lower in comparison with the CS. We consider that these differences between the ΔSBFT+ and CS were largely attributable to the lowerT ty in the former group, which took a prolonged time to reach the threshold of 36.69 °C.

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Muraki, S., Yamasaki, M., Ishii, K. et al. Relationship between core temperature and skin blood flux in lower limbs during prolonged arm exercise in persons with spinal cord injury. Europ. J. Appl. Physiol. 72, 330–334 (1996).

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Key words

  • Prolonged arm exercise
  • Spinal cord injury
  • Tympanic membrane temperature
  • Skin blood flux
  • Paralyzed lower limbs