caa a22 4500 469055065 CHVBK 20180323132841.0 cr unu---uuuuu 170328e19920101xx s 000 0 eng 10.1007/BF00376435 doi (NATIONALLICENCE)springer-10.1007/BF00376435 Metabolic, body temperature and hormonal responses to repeated periods of prolonged cycle-ergometer exercise in men [Elektronische Daten] [H. Kaciuba-Uscilko, B. Kruk, M. Szczypaczewska, B. Opaszowski, E. Stupnicka, B. Bicz, K. Nazar] Summary: This study was designed to find out whether rest intervals and prevention of dehydration during prolonged exercise inhibit a drift in metabolic rate, body temperature and hormonal response typically occurring during continuous work. For this purpose in ten healthy men the heart rate (t c), rectal temperature (T re), oxygen uptake (VO2), as well as blood metabolite and some hormone concentrations were measured during 2-h exercise at approximately 50% maximal oxygen uptake split into four equal parts by 30-min rest intervals during which body water losses were replaced. During each 30-min exercise period there was a rapid change in T re and t c superimposed on which, these values increased progressively in consecutive exercise periods (slow drift). The VO2 showed similar changes but there were no significant differences in the respiratory exchange ratio, pulmonary ventilation, mechanical efficiency and plasma osmolality between successive periods of exercise. Blood glucose, insulin and C-peptide concentrations decreased in consecutive exercise periods, whereas plasma free fatty acid, glycerol, catecholamine, growth hormone and glucagon concentrations increased. Blood lactate concentrations did not show any regular drift and the plasma cortisol concentration decreased during the first two exercise periods and then increased. In conclusion, in spite of the relatively long rest intervals between the periods of prolonged exercise and the prevention of dehydration several physiological and hormonal variables showed a distinct drift with time. It is suggested that the slow drift in metabolic rate could have been attributable in the main to the increased concentrations of heat liberating hormones. Springer-Verlag, 1992 Intermittent prolonged exercise nationallicence Body temperature nationallicence Metabolism nationallicence Water replacement nationallicence Hormones nationallicence Kaciuba-Uscilko H. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut Kruk B. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut Szczypaczewska M. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut Opaszowski B. Department of Physiology, Academy of Physical Education, Warsaw, Poland aut Stupnicka E. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut Bicz B. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut Nazar K. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 64/1(1992-01-01), 26-31 0301-5548 64:1<26 1992 64 421 https://doi.org/10.1007/BF00376435 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00376435 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kaciuba-Uscilko H. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut NATIONALLICENCE 700 1- Kruk B. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut NATIONALLICENCE 700 1- Szczypaczewska M. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut NATIONALLICENCE 700 1- Opaszowski B. Department of Physiology, Academy of Physical Education, Warsaw, Poland aut NATIONALLICENCE 700 1- Stupnicka E. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut NATIONALLICENCE 700 1- Bicz B. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut NATIONALLICENCE 700 1- Nazar K. Department of Applied Physiology, Medical Research Centre, Polish Academy of Sciences, Jazgarzewska 17, 00-730, Warsaw, Poland aut NATIONALLICENCE 773 0- European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 64/1(1992-01-01), 26-31 0301-5548 64:1<26 1992 64 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer