Increased glucagon secretion during hyperthermia in a sauna

Tatár, P.; Vigaŝ, M; Jurčovičová, J; Květňanský, Richard; Strec, V

doi:10.1007/bf02343805

Cited by 19 publications

(11 citation statements)

References 5 publications

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“…The increase in the secretion of lipolytic hormones, such as hGH, ACTH, cortisol and prolactin, which can be responsible for the increase in FFA, had been described before [14,16]. The increase in catecholamine and glucagon secretion, described by other researchers, as well as stimulation of the sympathetic part of the autonomic nervous system constitute other factors which activate lipolysis in thermal stress conditions [4,15,21,22,30]. Inhibition of insulin secretion and elevation of insulin resistance to glycemia are the factors which decrease lipogenesis [21,22], a process lowering the level of FFA in peripheral blood.…”

Section: Acknowledgementmentioning

confidence: 86%

“…The increase in catecholamine and glucagon secretion, described by other researchers, as well as stimulation of the sympathetic part of the autonomic nervous system constitute other factors which activate lipolysis in thermal stress conditions [4,15,21,22,30]. Inhibition of insulin secretion and elevation of insulin resistance to glycemia are the factors which decrease lipogenesis [21,22], a process lowering the level of FFA in peripheral blood. The increase in the FFA concentration as a result of overheating in sauna may, therefore, be a result of both intensification of lipolysis and decreased lipogenesis.…”

Section: Acknowledgementmentioning

confidence: 99%

“…The increase in the carbohydrates utilization, being a result of the increase in lactates concentration under thermal stress, was observed by many researchers [13,14,[18][19][20] and it can be explained by increased glycolysis. The conclusion which can be drawn from the majority of research works on the influence of sauna on the human body conducted in Scandinavian countries on volunteers using sauna on a daily basis is that overheating causes the shifting of metabolism toward carbohydrate changes [21][22][23][24]. The researchers, however, did not analyze lipid metabolism and, therefore, the present research is aimed at the comparison of physiological reactions and changes in the lipid profile of blood serum, depending on the duration of sauna baths.…”

Section: Introductionmentioning

confidence: 99%

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Changes in the lipid profile of blood serumin women taking sauna baths of various duration

Pilch¹,

Szyguła²,

Klimek³

et al. 2010

International Journal of Occupational Medicine and Environmental Health

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Objectives: There is little information on lipid metabolism after sauna treatment in the literature. The present research is aimed to determine the influence of sauna baths on fat metabolism in young women. Materials and Methods: Twenty healthy, eumenhorreic, female volunteers (19-21 yr old) were exposed to Finnish sauna bath seven times every second day. In group I (n = 10) each time the sauna treatment lasted 30 min, whereas in group II (n = 10) 40 min with 5-minute break to cool down. Body mass, heart rate and blood pressure were measured before and after sauna bath. Rectal temperature was monitored during stay in sauna room. Prior to the sauna bath and during its last two minutes the minute oxygen uptake and the level of CO 2 exhalation were analyzed in the exhaled air, and the respiratory quotient RQ was calculated. In the blood samples collected before the sauna bath and immediately afterwards hematocrit, hemoglobin, and lipid profiletotal lipids, free fatty acids, total free fatty acids, triacylglycerols, total cholesterol (TC), high density lipids (HDL), low density lipids (LDL) were analyzed. Results: Rectal temperature was lower in the last sauna bath than in the first one. Losses of plasma were greater during the seventh bath than during the first one. Acceleration of the metabolism of lipids occurs after every sauna bath. A reduced level of TC and LDLC and a raised level of HDL was observed after repeated sauna baths. Conclusion: After 2 weeks of repeated sauna session some changes in total cholesterol and concentration of LDLC were observed, while concentration of HDLC increased after 7th sauna bath in group I. Those kinds of changes may be good prognoses of ischemic heart disease prevention, but further research on the influence of sauna on fat metabolism is needed.

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Section: Acknowledgementmentioning

confidence: 86%

Section: Acknowledgementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Changes in the lipid profile of blood serumin women taking sauna baths of various duration

Pilch¹,

Szyguła²,

Klimek³

et al. 2010

International Journal of Occupational Medicine and Environmental Health

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“…Hyperthermia-induced rises in plasma NE levels in humans have been reported by many investigators during passive heat exposure (0.8°-3.0°C rise in T eore ) [7,15,30,31,106] and during exercise [2,13,16]. Sauna bathing (80°-85°C) for 20-30 min, with a 2°_3°C rise in Teore.…”

Section: Norepinephrine Epinephrine Dopaminementioning

confidence: 97%

“…Sauna bathing (80°-85°C) for 20-30 min, with a 2°_3°C rise in Teore. increased plasma NE and E (two-to threefold) in humans [30,106], and for 20min it elevated the To by 0.8°C and increased the plasma NE level (+86%) in women; the increase in E (+80%) was not significant [31]. In men, hot water immersion (41°C) for 3h, with a 1.2°C rise in Tre, increased plasma NE (+80%) and E (twofold) [7].…”

Section: Norepinephrine Epinephrine Dopaminementioning

confidence: 98%

Endocrine Responses to Heat and Cold Stress

Matsumoto

Nishiyama

Nishimura

et al. 2001

Thermotherapy for Neoplasia, Inflammation, and Pain

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Summary. This review focuses on the endocrine responses to thermal stimuli during passive heat or cold exposure, with particular reference to the relation of these responses to the changes in the body core temperature (Teare). Mild to moderate hyperthermia (<1°C rise in Teare) induces the release of growth hormone and prolactin (PRL). Moderate hypothermia (la_2°C fall in Teore) suppresses PRL release. A positive correlation between plasma PRL and Teare suggests some role for PRL in thermoregulation. Hypothermia activates the hypothalamo-pituitary-thyroid (HPT) axis and releases thyrotropin-releasing hormone, thyroid-stimulating hormone (TSH), and thyroid hormones and increases the metabolic rate. Enhancement of extrathyroidal production of triiodothyronine (T3) from thyroxine (T4) may precede the TSH response to cold. Both severe hyperthermia and hypothermia (1°_3°C changes in Teare) activate the hypothalamo-pituitary-adrenal (HPA) axis and the sympathetic nervous system, resulting in release of corticotropin-releasing factor, adrenocorticotropic hormone, cortisol, and norepinephrine. The responses in the HPT axis and the HPA axis are not apparent in humans, as they are in rats, probably owing to the larger body mass of humans. Hyperthermia stimulates the renin-angiotensin-aldosterone system and the release of arginine vasopressin (AVP) and atrial natriuretic peptide, but this might be due to nonthermal factors. Diuresis due to suppression of AVP release is induced by cold. Gonadal response to thermal stimuli is possibly suppressive. The hormonal responses induced by thermal stress are mostly dependent on the change in Teare in humans; in small animals they are also dependent on the change in skin temperature. I ntrod uctionBody core temperature (Teare) may increase during physical exercise and passive heating (while sauna bathing, with head-out water immersion, and exposure to hot environments); it decreases during cold exposure. Changes in Teare induce various endocrine responses to maintain homeostasis of the body. Recently, local and whole-body hyperthermia therapy for cancer and some benign diseases and induced hypothermia treatment to protect the important organs from hypoxic damage have been developed and widely utilized. On these occasions, the endocrine responses induced by the changes in Teare should be considered. Hormonal responses and their relation to the immune system during exercise in the heat and passive hyperthermia have been reviewed [1][2][3], but little attention has been paid to the relation of endocrine responses to the change in Teare. Body heating and cooling paradigms may include concurrent psychological stress. This review focuses on the endocrine responses to thermal stimuli during passive heating and cooling, with particular reference to their relation to changes in Teare. The study was undertaken to elucidate the thermal influence alone, excluding the influence of non thermal stress. Growth HormoneThere have been many consistent findings that hyperthermia induces a rapid rise in ci...

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Haemodynamic and hormonal responses to heat exposure in a Finnish sauna bath

Kukkonen-Harjula

Oja

Laustiola

et al. 1989

Europ. J. Appl. Physiol.

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Eight healthy young men were studied during three periods of heat exposure in a Finnish sauna bath: at 80 degrees C dry bulb (80 D) and 100 degrees C dry bulb (100 D) temperatures until subjective discomfort, and in 80 degrees C dry heat, becoming humid (80 DH) until subjective exhaustion. Oral temperature increased 1.1 degrees C at 80 D, 1.9 degrees C at 100 D and 3.2 degrees C at 80 DH. Heart rate increased about 60% at 80 D, 90% at 100 D and 130% at 80 DH. Plasma noradrenaline increased about 100% at 80 D, 160% at 100 D and 310% at 80 DH. Adrenaline did not change. Plasma prolactin increased 2-fold at 80 D, 7-fold at 100 D and 10-fold at 80 DH. Blood concentrations of the beta-endorphin immunoreactivity at 100 D, adrenocorticotropic hormone (ACTH) at 100 D and 80 DH, growth hormone at 100 D and testosterone at 80 DH also increased, but cortisol at 80 D and 100 D decreased. The plasma prostaglandin E2 and serum thromboxane B2 levels did not change. Patterns related to heat exposure were observed for heart rate, plasma noradrenaline, ACTH and prolactin in the three study periods.

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Increased glucagon secretion during hyperthermia in a sauna

Cited by 19 publications

References 5 publications

Changes in the lipid profile of blood serumin women taking sauna baths of various duration

Changes in the lipid profile of blood serumin women taking sauna baths of various duration

Endocrine Responses to Heat and Cold Stress

Haemodynamic and hormonal responses to heat exposure in a Finnish sauna bath

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