title: Central dopaminergic neurotransmission plays an important role in thermoregulation and performance during endurance exercise.
abstract: Dopamine (DA) has been widely investigated for its potential role in determining exercise performance. It was originally thought that DA's ergogenic effect was by mediating psychological responses. Recently, some studies have also suggested that DA may regulate physiological responses, such as thermoregulation. Hyperthermia has been demonstrated as an important limiting factor during endurance exercise. DA is prominent in the thermoregulatory centre, and changes in DA concentration have been shown to affect core temperature regulation during exercise. Some studies have proposed that DA or DA/noradrenaline (NA) reuptake inhibitors can improve exercise performance, despite hyperthermia during exercise in the heat. DA/NA reuptake inhibitors also increase catecholamine release in the thermoregulatory centre. Intracerebroventricularly injected DA has been shown to improve exercise performance through inhibiting hyperthermia-induced fatigue, even at normal ambient temperatures. Further, caffeine has been reported to increase DA release in the thermoregulatory centre and improves endurance exercise performance despite increased core body temperature. Taken together, DA has been shown to have ergogenic effects and increase heat storage and hyperthermia tolerance. The mechanisms underlying these effects seem to involve limiting/overriding the inhibitory signals from the central nervous system that result in cessation of exercise due to hyperthermia.
authors.affiliation: a Graduate School of Integrated Arts and Sciences, Hiroshima University , Higashihiroshima , Japan.
authors.forename: Xinyan
authors.initials: X
authors.lastname: Zheng
authors.affiliation: a Graduate School of Integrated Arts and Sciences, Hiroshima University , Higashihiroshima , Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Hasegawa
mesh_terms: D000818:Animals; D001833:Body Temperature Regulation / Q000502:physiology*; D016642:Bupropion; D002110:Caffeine; D004298:Dopamine / Q000502:physiology*; D015444:Exercise / Q000502:physiology*; D005260:Female; D005334:Fever; D006801:Humans; D008297:Male; D018377:Neurotransmitter Agents / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology*; D051381:Rats; D017208:Rats, Wistar
chemical_list: D018377:Neurotransmitter Agents; D016642:Bupropion; D002110:Caffeine; D004298:Dopamine
keywords: Exercise performance; bupropion; caffeine; dopamine; dopamine receptor antagonist; hyperthermia