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1

The model of human thermoregulatory system for positive heat loads

100%
Grucza R.
Acta Physiologica Polonica
|
1982
|
tom 33
|
nr 4
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Water loss distribution in exercising men under hot conditions

100%
Grucza R.
Acta Physiologica Polonica
|
1987
|
tom 38
|
nr 1
3

Relationship between electrical skin resistance and rectal temperature in man during physical exercise

100%
Grucza R.
Acta Physiologica Polonica
|
1984
|
tom 35
|
nr 3
4

Modele mechanizmów termoregulacji u człowieka

100%
Grucza R.
Acta Physiologica Polonica
|
1979
|
tom 30
|
nr Supl.18[2]
5

Importance of dynamics of sweating in men during exercise

63%
Grucza R., Hanninen O.
Acta Physiologica Polonica
|
1990
|
tom 41
|
nr 7
Grucza R. and Hänninen O.: Importance of dynamics of sweating in men during exercise. Acta Physiol. Pol. Influence of dynamics of sweating on rectal temperature increase was tested in 3 groups of men performing cycle exercise with intensity of 65, 90 and 120 W, respectively, in 22°C chamber temperature and 30% of relative air humidity. During exercise at 65 and 90 W the subjects wore suits while exercising with intensity of 120 W they wore only shorts. The dynamics of sweating was described by delay in onset of sweating and time constant of the reaction. Wearing caused significant increase in skin humidity and decreased evaporative rate of sweating. Sweat rate during steady state was related to the metabolic rate in naked (r = 0.89, p < 0.002) as well as in wearing subjects (r = 0.93, p < 0.01). Delay in onset of sweating was, in average, 5 min with a time constant of 7 min. Both factors showed a tendency to be shorter with increasing work intensity. Mean increase in rectal temperature was proportional to the intensity of exercise although the individual ATre correlated well with the dynamics of sweating in naked (r = 0.83, p < 0.01) and wearing subjects (r = 0.84, p < 0.01). Since ΔTre was smaller in subjects with shorter inertia time of sweating in response to beginning of exercise at the same intensity it is concluded that the dynamics of sweating can play an important role in limiting body temperature increase in working men.
6

A simple method for accurate temperature measurement

63%
Grucza R., Boruta E.
Acta Physiologica Polonica
|
1980
|
tom 31
|
nr 4
7

Effect of acclimation to heat on the hypothalamic thermal sensitivity in the rabbit

51%
Kruk B., Lyszczarz J., Boruta E., Grucza R.
Acta Physiologica Polonica
|
1981
|
tom 32
|
nr 2
8

Effect of prolonged exposure to heat on the thermoregulatory reactions to high ambient temperature in rabbits

51%
Kruk B., Lyszczarz J., Boruta E., Grucza R.
Acta Physiologica Polonica
|
1981
|
tom 32
|
nr 2
9
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Effect of work rate on cardiorespiratory response to rhythmic static exercise

51%
Grucza R., Miyamoto Y., Nakazono Y.
Journal of Physiology and Pharmacology
|
1994
|
tom 45
|
nr 4
10
Content available remote

Exercise training and 3-day head down bed rest deconditioning: exercise thermoregulation

33%
Smorawinski J., Mlynarczyk C., Ziemba A. W., Mikulski T., Cybulski G., Grucza R., Nazar K., Kaciuba-Uscilko H., Greenleaf J. E.
Journal of Physiology and Pharmacology
|
2005
|
tom 56
|
nr 1
Bed rest (BR) deconditioning causes excessive increase of exercise core body tempera-ture, while aerobic training improves exercise thermoregulation. The study was designed to determine whether 3 days of 6° head-down bed rest (HDBR) affects body temperature and sweating dynamics during exercise and, if so, whether endurance training before HDBR modifies these responses. Twelve healthy men (20.7±0.9 yrs, VO2max: 46±4 ml·kg-1·min-1) underwent HDBR twice: before and after 6 weeks of endurance training. Before and after HDBR, the subjects performed 45 min sitting cycle exercise at the same workload equal to 60% of VO2max determined before training. During exercise the VO2, HR, tympanic (Ttymp) and skin (Tsk) temperatures were recorded; sweating dynamics was assayed from a ventilated capsule on chest. Training increased VO2max by 12.1% (p<0.001). Resting Ttymp increased only after first HDBR (by 0.22 ± 0.08 °C, p<0.05), while exercise equilibrium levels of Ttymp were increased (p<0.05) by 0.21 ± 0.07 and 0.26 ± 0.08 °C after first and second HDBR, respectively. Exercise mean Tsk tended to be lower after both HDBR periods. Total sweat loss and time-course of sweating responses were similar in all exercise tests. The sweating threshold related to Ttymp was elevated (p<0.05) only after first HDBR. In conclusion: six-week training regimen prevents HDBR-induced elevation of core temperature (Ttymp) at rest but not during ex-ercise. The post-HDBR increases of Ttymp without changes in sweating rate and the tendency for lower Tsk suggest an early (<3d) influence of BR on skin blood flow.
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