Importance of dynamics of sweating in men during exercise

• Autorzy: Grucza R. , Hanninen O.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

dynamics; sweating; man; exercise; thermoregulation; body temperature

• Wydawca: -
• Czasopismo: Acta Physiologica Polonica
• Rocznik: 1990
• Tom: 41
• Numer: 7
• Opis fizyczny: p.65-75,fig.,ref.

Twórcy

autor

Grucza R.

• Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730 Warsaw, Poland

autor

Hanninen O.

• Department of Physiology, University of Kuopio, 70-211 Kuopio, Finland

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