ABSTRACT
Objective To evaluate exertional overheating and endurance during and after physical exercise on individuals with hypohidrotic ectodermal dysplasia(HED) ,to assess protective effects of skin cooling device ,and to provide theoretical basis for ex-ternal cooling devices .Methods 12 HED patients and 12 age-matched healthy controls were studied during standardized exercise on a treadmill at ambient temperatures of 25 ℃ and 30 ℃ .Body core temperature ,performance ,heart rate ,respiratory rate ,blood pres-sure and serum lactate were investigated during and after exercise .Results HED subjects experienced a significantly greater rise in body temperature after cycling than healthy controls ,and their body temperature remained elevated longer(P<0 .05) .HED subjects had a lower endurance time(F=9 .985 ,P=0 .005) and increasing speed value(F=7 .158 ,P=0 .014) .However ,serum lactate value of the HED subjects found to be higher than the controls (F=5 .204 ,P=0 .033) .Maximum heart rates ,respiratory rate and blood pressure did not differ significantly between HED and the control groups .However ,compared with controls ,body temperature and endurance time of HED patients equipped with skin cooling device had no statistical significance .Conclusion HED subjects showed a significantly greater rise of body temperature during exercise than the control groups ,and their body temperature remained elevat-ed longer than in healthy subjects ,and had a lower performance .External evaporative skin cooling attenuates exertional overheating in HED patients and may facilitate their participation in athletic activities and professional life .