Effects of cold exposure and exercise intensity on metabolic and thermoregulatory responses

2020 ◽  
Vol 3 (5) ◽  
pp. 464-472
Author(s):  
Brittany Followay ◽  
Yongsuk Seo ◽  
Jeremiah Vaughan ◽  
Ellen L. Glickman ◽  
Adam R. Jajtner
Keyword(s):  
Cold Exposure ◽  
Exercise Intensity ◽  
Thermoregulatory Responses

Ten-day endurance training attenuates the hyperosmotic suppression of cutaneous vasodilation during exercise but not sweating

2005 ◽  
Vol 99 (1) ◽  
pp. 237-243 ◽  
Author(s):  
Takashi Ichinose ◽  
Kazunobu Okazaki ◽  
Shizue Masuki ◽  
Hiroyuki Mitono ◽  
Mian Chen ◽  
...  
Keyword(s):  
Endurance Training ◽  
Exercise Intensity ◽  
Plasma Osmolality ◽  
Young Male ◽  
Cycle Ergometer ◽  
Peak Oxygen Consumption ◽  
Cutaneous Vasodilation ◽  
Thermoregulatory Responses ◽  
Before And After ◽  
The Individual

It is well known that hyperosmolality suppresses thermoregulatory responses and that plasma osmolality (Posmol) increases with exercise intensity. We examined whether the decreased esophageal temperature thresholds for cutaneous vasodilation (THFVC) and sweating (THSR) after 10-day endurance training (ET) are caused by either attenuated increase in Posmol at a given exercise intensity or blunted sensitivity of hyperosmotic suppression. Nine young male volunteers exercised on a cycle ergometer at 60% peak oxygen consumption rate (V̇o2 peak) for 1 h/day for 10 days at 30°C. Before and after ET, thermoregulatory responses were measured during 20-min exercise at pretraining 70% V̇o2 peak in the same environment as during ET under isoosmotic or hyperosmotic conditions. Hyperosmolality by ∼10 mosmol/kgH2O was attained by acute hypertonic saline infusion. After ET, V̇o2 peak and blood volume (BV) both increased by ∼4% ( P < 0.05), followed by a decrease in THFVC ( P < 0.05) but not by that in THSR. Although there was no significant decrease in Posmol at the thresholds after ET, the sensitivity of increase in THFVC at a given increase in Posmol [ΔTHFVC/ΔPosmol,°C·(mosmol/kgH2O)−1], determined by hypertonic infusion, was reduced to 0.021 ± 0.005 from 0.039 ± 0.004 before ET ( P < 0.05). The individual reductions in ΔTHFVC/ΔPosmol after ET were highly correlated with their increases in BV around THFVC ( r = −0.89, P < 0.005). In contrast, there was no alteration in the sensitivity of the hyperosmotic suppression of sweating after ET. Thus the downward shift of THFVC after ET was partially explained by the blunted sensitivity to hyperosmolality, which occurred in proportion to the increase in BV.

scholarly journals The potential role of irisin in the thermoregulatory responses to mild cold exposure in adults

2016 ◽  
Vol 28 (5) ◽  
pp. 699-704 ◽  
Author(s):  
Emily K. Calton ◽  
Mario J. Soares ◽  
Anthony P. James ◽  
Richard J. Woodman
Keyword(s):  
Cold Exposure ◽  
Potential Role ◽  
Thermoregulatory Responses

Does Exercise Intensity Modulate The Thermoregulatory Responses To Intermittent And Continuous Exercise?

2009 ◽  
Vol 41 ◽  
pp. 343
Author(s):  
Barry Drust ◽  
Steven Jones ◽  
Helen Jones ◽  
Warren Gregson ◽  
Greg Atkinson
Keyword(s):  
Exercise Intensity ◽  
Continuous Exercise ◽  
Thermoregulatory Responses

Thermoregulatory responses of young and older men to cold exposure

1992 ◽  
Vol 65 (6) ◽  
pp. 492-498 ◽  
Author(s):  
Yoshimitsu Inoue ◽  
Mikio Nakao ◽  
Tsutomu Araki ◽  
Hiroyuki Ueda
Keyword(s):  
Cold Exposure ◽  
Older Men ◽  
Thermoregulatory Responses

SEASONAL ENERGY EXPENDITURES AND THERMOREGULATORY RESPONSES OF BISON AND CATTLE

1979 ◽  
Vol 59 (3) ◽  
pp. 611-617 ◽  
Author(s):  
R. J. CHRISTOPHERSON ◽  
R. J. HUDSON ◽  
M. K. CHRISTOPHERSEN
Keyword(s):  
Cold Exposure ◽  
Low Temperatures ◽  
Metabolic Rates ◽  
Heart Rates ◽  
Ambient Temperatures ◽  
Energy Expenditures ◽  
Thermoregulatory Responses ◽  
Air Temperatures ◽  
Wind Velocities

The metabolic rates of two bison and four Hereford spring-born calves were measured at monthly intervals from December until the following November. Following adaptation at seasonal ambient temperatures, metabolic measurements were made while calves were exposed to controlled temperatures of +10, 0 and −30 °C. Exposure of the Hereford calves to −30 °C resulted in increased metabolic rates during the first 6 mo of the study but the magnitude of the response was greatly attenuated as the calves grew larger. At −30 °C, bison calves either maintained or reduced metabolic rates compared to expenditures at +10 °C. When the calves were about 17 mo of age, they were exposed to a combination of low temperatures and wind. Wind velocities of 4.7 km∙h−1 did not influence metabolic rates of either bison or Herefords at air temperatures of 0 °C. However, at −30 °C, metabolic rates increased from 650 and 700 KJ∙kg−.75∙d−1 to 835 and 950 KJ∙kg−.75∙d−1 in Hereford and bison calves, respectively. Neither respiratory frequencies nor heart rates were influenced significantly during cold exposure, but heart rates increased in response to wind. In general, metabolic rates and heart rates were lower in bison calves.

scholarly journals Effects of acute hypobaric hypoxia on thermoregulatory and circulatory responses during cold air exposure

2020 ◽  
Vol 39 (1) ◽  
Author(s):  
Sora Shin ◽  
Yoshiki Yasukochi ◽  
Hitoshi Wakabayashi ◽  
Takafumi Maeda
Keyword(s):  
Pulse Rate ◽  
Cold Exposure ◽  
Hypobaric Hypoxia ◽  
Total Duration ◽  
Negative Relationship ◽  
Barometric Pressure ◽  
Experimental Conditions ◽  
Simultaneous Exposure ◽  
Air Exposure ◽  
Thermoregulatory Responses

Abstract Background The thermoregulatory responses during simultaneous exposure to hypoxia and cold are not well understood owing to the opposite reactions of vasomotor tone in these two environments. Therefore, the purpose of this study was to investigate the influences of hypobaric hypoxia on various thermoregulatory responses, including skin blood flow (SkBF) during cold exposure. Methods Ten subjects participated in two experimental conditions: normobaric normoxia with cold (NC, barometric pressure (PB) = 760 mmHg) and hypobaric hypoxia with cold (HC, PB = 493 mmHg). The air temperature was maintained at 28 °C for 65 min and gradually decreased to 19 °C for both conditions. The total duration of the experiment was 135 min. Results The saturation of percutaneous oxygen (SpO2) was maintained at 98–99% in NC condition, but decreased to around 84% in HC condition. The rectal and mean skin temperatures showed no significant differences between the conditions; however, the forehead temperature was higher in HC condition than in NC condition. The pulse rate increased in HC condition, and there was a strong negative relationship between SpO2 and pulse rate (r = − 0.860, p = 0.013). SkBF and blood pressure showed no significant differences between the two conditions. Conclusion These results suggest that hypobaric hypoxia during cold exposure did not alter the overall thermoregulatory responses. However, hypobaric hypoxia did affect pulse rate regardless of cold exposure.

Effects Of Aspirin On Thermoregulatory Responses In Males During Acute Cold Exposure

2005 ◽  
Vol 37 (Supplement) ◽  
pp. S212-S213
Author(s):  
Ronald Otterstetter ◽  
Leigh Murray ◽  
Michael Kalinski ◽  
Ellen L. Glickman
Keyword(s):  
Cold Exposure ◽  
Acute Cold Exposure ◽  
Thermoregulatory Responses

THE EFFECTS OF NICOTINE ON THE THERMOREGULATORY RESPONSES DURING ACUTE COLD EXPOSURE

2001 ◽  
Vol 33 (5) ◽  
pp. S161
Author(s):  
C C. Cheatham ◽  
N Caine ◽  
M Blegen ◽  
E S. Potkanowicz ◽  
E L. Glickman
Keyword(s):  
Cold Exposure ◽  
Acute Cold Exposure ◽  
Thermoregulatory Responses
Sign in / Sign up

Export Citation Format

Share Document